The list of tennis's biggest winners—including the record-holders for singles, doubles, and Grand Slams—dates back decades. Established greats like Pete Sampras, Bjorn Borg, Jimmy Connors, and Billie Jean King still hold noted spots on the record lists. Other titles are held by some of the sport's most successful contemporary pros, including Serena Williams, Roger Federer, and Rafael Nadal.

Grand Slam in Singles Chris Ryan/Getty Images A Grand Slam in singles occurs when a professional tennis player wins all four of the sport's most important tournaments in a single calendar year: the Australian Open, French Open, Wimbledon, and U.S. Open. None of the current big names in tennis have achieved this honor. Serena Williams came close in 2017 but lost in the Wimbledon finals in July of that year. The most recent tennis great to have achieved the feat was Steffi Graf in 1988. Rod Laver achieved this difficult task twice during the 1960s. Don Budge: 1938 Maureen Connolly: 1953 Rod Laver: 1962 and 1969 Margaret Smith Court: 1970 Steffi Graf: 1988

Most Grand Slam Singles Titles: Men Roger Federer, the ironman of tennis, has won the most singles titles—20 as of summer 2018. “I love this tournament," Federer said in July 2017, just before his finals match at Wimbledon. "All my dreams came true here as a player. ... I hope I can play one more good match.” He certainly did, winning the tournament for the eighth time just a day after making that statement. Roger Federer: 20 Rafael Nadal:​ 16 Pete Sampras: 14 Roy Emerson and Novak Djokovic: 12 Rod Laver: 11

Most Grand Slam Singles Titles: Women In 1989, one of the players on this list won one of her Grand Slam titles at the expense of another: tennis pros Martina Navratilova and Steffi Graf had a showdown that led to an epic finale. Navratilova maintains the record for the greatest number of single titles, but Graf beat her that day: 6-2, 6-7, 6-1. Both great players are among the top five female Grand Slam title winners. Margaret Smith Court: 24 Serena Williams:​ 23 Steffi Graf: 22 Helen Wills Moody: 19 Martina Navratilova and Chris Evert: 18

Most Career Singles Titles: Men With all the focus on current tennis stars, it's easy to forget one of the most iconic figures who ever played the game: Jimmy Connors, who still holds a sizable lead over Roger Federer in the number of singles titles each has won. Bleacher Report ranks Connors as the seventh best tennis player in the sport's history and considering the number of men's singles titles he's won, it's not hard to see why. Jimmy Connors: 109 Roger Federer: 97 Ivan Lendl: 94 Rafael Nadal: 78 John McEnroe: 77

Most Career Singles Titles: Women If there is a figure—male or female—who towers above all other competitors in the tennis world, it is certainly Martina Navratilova. Over the course of her career, she won 167 singles titles, 50 more than Jimmy Connors. Her tennis matches with Chris Evert, who won just 10 fewer singles titles than Navratilova, were epic. Martina Navratilova: 167 Chris Evert: 157 Steffi Graf: 107 Margaret Smith Court: 92 Serena Williams: 72

Most Career Singles and Doubles* Titles: Men John McEnroe had a reputation as a feisty, fiery presence on the tennis court. His arguments with line judges often turned into screaming matches, earning the tennis pro time on the evening news. It's somewhat surprising, then, that McEnroe excelled in doubles, matches where he had to play—and presumably get along—with another tennis partner. Today, McEnroe still stands at the top of the list for men's combined singles and doubles titles. John McEnroe: 155 Jimmy Connors: 124 Mike Bryan: 118 Bob Bryan: 116 Rod Laver: 111 *Doubles title counts do not include mixed doubles.