1. Pete Sampras
   Bjorn Borg
2. Andre Agassi
   Rod Laver

Few tennis stars get to leave the game on their own terms, as most of them continue to push for more championships even after their prime has passed. Pete Sampras, however, went out a champion, winning his final match at the 2002 US Open to take home his 14th Grand Slam singles title.

1. Venus Williams
   Martina Navratilova
2. Maria Sharapova
   Justine Henin

Martina Navratilova was dominant in both singles and doubles tennis throughout her lengthy career, holding the No. 1 spot in both divisions for at least 200 weeks. She held that No. 1 position for five consecutive years in singles and three consecutive years in doubles.

1. Chris Evert
   Monica Seles
2. Serena Williams
   Martina Hingis

In both the singles and doubles categories, Serena Williams has been dominant on the tennis court. She holds a total of 39 Grand Slam titles, with a majority of them coming as a singles competitor.

1. Andre Agassi
   Rod Laver
2. John McEnroe
   Pancho Gonzales

Though he didn't rack up as many titles as some of the other tennis stars, Andre Agassi was able to win at a multitude of tournaments during his career. In fact, he's the only male player to ever achieve a Career Golden Slam and to win at the ATP Tour World Championships.

1. Billie Jean King
   Margaret Court
2. Steffi Graf
   Monica Seles

While most competitors have one or two courts they star on, Steffi Graf was consistently great at every Grand Slam tournament. She won all four Grand Slam tournaments at least four times in the singles division, which included a Golden Slam in 1988 where she won all four tournaments and an Olympic gold medal.

1. Novak Djokovic
   Rafael Nadal
2. Andy Murray
   Stefan Edberg

To go along with his personal career, Rafael Nadal is also a two-time gold medalist at the Olympic Games as a representative of Spain. He won his first gold medal in the 2008 singles in Beijing and his second in the 2016 doubles in Rio de Janeiro.

1. Chris Evert
   Margaret Court
2. Martina Hingis
   Kim Clijsters

Chris Evert was one of the greatest champions in the history of tennis, winning 157 career titles. She always performed well in Grand Slam tournaments, reaching the singles finals a record 34 times.

1. Lindsay Davenport
   Billie Jean King
2. Jennifer Capriati
   Helen Wills

One of Billie Jean King's most famous matches came in 1973 when she competed against a male competitor, Bobby Riggs. Known as the "Battle of the Sexes," King won the matchup in three sets, which is often considered a turning point for women's tennis.

1. Gabriela Sabatini
   Naomi Osaka
2. Victoria Azarenka
   Venus Williams

Venus Williams is often overshadowed by her sister, Serena, but she's actually one of the greatest tennis players to ever take the court in both singles and doubles. She has a total of 21 Grand Slam titles and has been ranked No. 1 in both divisions.

1. Boris Becker
   Stefan Edberg
2. Novak Djokovic
   Jimmy Connors

Novak Djokovic finally completed a Career Grand Slam in 2016 by winning the French Open. Djokovic had previously won all three other Grand Slam events the year before, which gave him a non-calendar year Grand Slam as well.

1. Roy Emerson
   Andy Roddick
2. John McEnroe
   John Newcombe

John McEnroe performed his best at the US Open and at Wimbledon, the only two major tournaments where he won titles. He actually holds the single tournament record at Wimbledon for winning percentage and the most combined singles and doubles titles at the US Open.

1. Monica Seles
   Justine Henin
2. Maria Sharapova
   Gabriela Sabatini

Monica Seles almost earned a Grand Slam in 1992, but she couldn't get a victory at Wimbledon after making it to the finals. Finishing her career in 2008, Wimbledon was the only major tournament where Seles wasn't able to get a win.

1. Ivan Lendl
   Rod Laver
2. Mats Wilander
   Bill Tilden

Still an amateur at the time, Rod Laver had one of the best years of his career in 1962 when he completed a Grand Slam by winning all four major tournaments. It was his first win at both the French Open and US Open, both of which he would win again later in his career.

1. Boris Becker
   Jimmy Connors
2. Arthur Ashe
   Bill Tilden

Turning pro in 1972 and retiring in 1996, Jimmy Connors played in a total of 1,556 matches with 1,274 wins, both men's singles records. He's also first in the Open Era with 109 titles, making Connors one of the most accomplished tennis stars ever.

1. Rafael Nadal
   Novak Djokovic
2. John McEnroe
   Roger Federer

No male tennis player in the history of the game has held the No. 1 ranking longer than Roger Federer. First reaching the No. 1 spot in 2004, Federer has held that position for 310 weeks total, including 237 consecutive weeks.

1. Andy Murray
   Mats Wilander
2. Ivan Lendl
   Ken Rosewall

Ivan Lendl won seven of his eight Grand Slam singles titles in the 1980s, winning his final major tournament in 1990. Throughout the '80s, he was also ranked No. 1 for 270 weeks, establishing himself as arguably the best player of the decade.

1. Boris Becker
   Jimmy Connors
2. Ivan Lendl
   Bjorn Borg

Bjorn Borg had some of the toughest matches of his career in the finals of the US Open, in which he appeared four times. Borg lost each time, twice to Jimmy Connors and twice to John McEnroe.

1. Fred Perry
   Pat Rafter
2. Lleyton Hewitt
   Arthur Ashe

Arthur Ashe competed in over 1,400 singles matches in his career, compiling a record of 1085-337. Those matches added up to 76 singles titles accompanied by wins at the Australian Open, Wimbledon and the US Open.

1. Don Budge
   Jim Courier
2. Boris Becker
   Ken Rosewall

Though he wasn't known for competing in doubles, Boris Becker won the only gold medal of his career in doubles at the 1992 Olympic Games in Barcelona. Representing Germany, Becker and Michael Stich defeated Wayne Ferreira and Piet Norval out of South Africa in the finals.

1. Gabriela Sabatini
   Arantxa Sanchez
2. Victoria Azarenka
   Maria Sharapova

In 2012, Maria Sharapova completed a Career Grand Slam by winning the French Open, making her the only Russian player to accomplish the feat. She's also the only female from Russia to hold the No. 1 position in singles, which she reached in 2005.

1. Kim Clijsters
   Simona Halep
2. Suzanne Lenglen
   Amelie Mauresmo

In 2003, Kim Clijsters reached the No. 1 ranking in both singles and doubles. That year, she won the French Open and Wimbledon in doubles and reached the finals at the French Open in singles, helping establish herself as a star in the sport.

1. Lindsay Davenport
   Suzanne Lenglen
2. Amelie Mauresmo
   Agnieszka Radwanska

Between 1998 and 2000, Lindsay Davenport won three titles at three different major tournaments: the US Open, Wimbledon and the Australian Open. In the finals of those tournaments, she proved her greatness by never losing a set.

1. Amelie Mauresmo
   Mary Pierce
2. Caroline Wozniacki
   Martina Hingis

Martina Hingis could have left her place on tennis history had she won the 1997 French Open, the only tournament she didn't get a victory at that year. Ranked No. 1 at the time, she lost the French Open to Iva Majoli in two sets.

1. Bill Tilden
   Stefan Edberg
2. Andy Roddick
   John Newcombe

Without a strong serve, Stefan Edberg turned to his volley to win matches against elite competitors. He often even used a slow serve to his advantage, as it gave him more time to attack the net and pressure his opponent.

1. Kim Clijsters
   Lindsay Davenport
2. Jennifer Capriati
   Margaret Court

No tennis star has more Grand Slam titles under their belt than Margaret Court, who holds 64 total. She won 24 of those as a singles competitor, which is also a record, but 13 of those titles were acquired before the Open era.

1. Justine Henin
   Evonne Goolagong Cawley
2. Maureen Connolly
   Simona Halep

The single-handed backhand is a tough move for tennis players, as most prefer to use both hands, but Justine Henin was a master with it. She used it effectively throughout her career to cover the entire court, one of the reasons she won 525 singles matches.

1. Pancho Gonzales
   Reginald Doherty
2. Jack Kramer
   Pete Sampras

Prior to the Open era of tennis, Pro Slams were considered the biggest tennis tournaments each year for professional players. Pancho Gonzales was one of the best at these tournaments, finishing his career with 12 Pro Slam titles.

1. Gabriela Sabatini
   Arantxa Sanchez
2. Suzanne Lenglen
   Jennifer Capriati

Jennifer Capriati wasn't even 30 years old when she decided to retire from tennis in 2004, mainly due to injuries. However, she had already established her legacy by then, which was recognized when she made the International Tennis Hall of Fame in 2012.

1. Roy Emerson
   Mats Wilander
2. Gustavo Kuerten
   Jim Courier

Mats Wilander shot to the top of the tennis world in 1982 when he won the French Open unexpectedly at the age of 17. He continued to win major tournaments throughout the '80s, finishing his career with seven major titles.

1. Lindsay Davenport
   Helen Wills
2. Evonne Goolagong Cawley
   Maureen Connolly

Despite not winning the US Open, Evonne Goolagong Cawley competed in the finals of the event four straight years from 1973 through 1976. She played some of the best women in tennis in these finals, including Margaret Court, Billie Jean King and Chris Evert.

1. Don Budge
   Pat Rafter
2. Vitas Gerulaitis
   John Newcombe

With one of the most likable personalities in tennis history, John Newcombe proved he wasn't just a great individual star but was also a great team player, winning five Davis Cups as a member of the Australian team. He won the event alongside other great Australian tennis stars like Fred Stolle and Roy Emerson.

1. Gabriela Sabatini
   Amelie Mauresmo
2. Arantxa Sanchez Vicario
   Angelique Kerber

Known as the "Barcelona Bumblebee," Arantxa Sanchez Vicario was a Spanish tennis player who was the first person from the country to reach the No. 1 ranking in tennis. She hit that ranking in 1995, coming off a year where she won both the French Open and the US Open.

1. Guillermo Vilas
   Roy Emerson
2. Gustavo Kuerten
   Stan Wawrinka

Holding a total of 28 major titles, Roy Emerson won every Grand Slam tournament, in both singles and doubles, at least twice in his celebrated career. That makes him the only player to complete a Career Grand Slam in both divisions.

1. Maria Bueno
   Gabine Muguruza
2. Althea Gibson
   Angelique Kerber

Though she was a great singles competitor, Maria Bueno really found success in doubles. Her best year in doubles came in 1960 when she earned a Grand Slam by winning all four major tournaments with two different partners.

1. Thomas Muster
   Lew Hoad
2. Ken Rosewall
   Stan Smith

Ken Rosewall went on a tear in the 1971 Australian Open, defeating Arthur Ashe to take home the title. At the event, Rosewall was the first male player to win a major tournament in the Open era without dropping a set.

1. Jim Courier
   Pat Cash
2. Lew Hoad
   Don Budge

Don Budge was the first tennis player to ever achieve a Grand Slam in a single year, an accomplishment he earned in 1938. Astonishingly, Budge also won two majors the year prior, giving him six Grand Slam titles in a row.

1. John Newcombe
   Don Budge
2. Bill Tilden
   Jim Courier

When Bill Tilden defeated Zenzo Shimizu in the finals to take home the title at Wimbledon in 1920, he became the first American to win the event. He went on to win it the next year and one final time in 1930 before turning pro in 1931.

1. Mary Pierce
   Suzanne Lenglen
2. Maria Bueno
   Alice Marble

First finding success on the tennis court in 1914 at the age of 15, Suzanne Lenglen had to put her career on hold as World War I played out. Returning in 1919, she took the tennis world by storm, winning eight Grand Slam titles by the end of 1926.

1. Maureen Connolly
   Virginia Wade
2. Tracy Austin
   Angelique Kerber

In 1953, Maureen Connolly became the first woman to earn a Grand Slam in a calendar year by winning all four major tournaments. She won two more Grand Slam events the following year before a horseback riding accident forced her to retire.

1. Maureen Connolly
   Helen Wills
2. Suzanne Lenglen
   Mary Pierce

Helen Wills competed in the 1924 Olympics, the final time tennis was held at the Olympic Games until 1988. In her one appearance at the Olympics, Wills won gold in both singles and doubles, helping establish her place as one of the biggest stars in tennis history.