1978–1980 Lendl turned professional in 1978 and ended the year ranked 74. In the quarter finals, McEnroe's full repertoire of on-court "antics" was on display as he beat Lendl in four sets. This was the first Lendl–McEnroe Grand Slam meeting and Lendl's first Grand Slam quarter final. Lendl was part of
Czechoslovakia's Davis Cup winning team that year. However, he stopped playing in the Davis Cup and World Team Cup after he moved to the United States in 1986 because the Czechoslovak Tennis Association viewed him as an "illegal defector" from their country.
1981 The success continued in 1981, as he won ten titles. He reached his first Grand Slam final at the French Open in 1981, where he lost in five sets to
Björn Borg. At Wimbledon he was "outserved" by Charlie Fancutt in the first round in five sets. At the US Open, Lendl lost in the fourth round in five sets to
Vitas Gerulaitis. Gerulaitis often rushed the net to win the first two sets, but reverted to a baseline game in losing the next two and resumed his net rushing tactics in the fifth. He won his first season-ending
Masters Grand Prix tour title, coming from 2 sets to 0 and match point down to beat Gerulaitis in five sets in the final. Lendl was part of the Czechoslovak team that won the
World Team Cup. He relocated to the United States in 1981, first living at the home of mentor and friend,
Wojtek Fibak.
1982 In 1982, Lendl won 15 of the 23 singles tournaments he entered and had a 44-match winning streak. Lendl competed on the
World Championship Tennis (WCT) tour, where he won all ten tournaments he entered, including his first
WCT Finals, where he defeated
John McEnroe in straight sets. Lendl faced McEnroe again in the
Masters Grand Prix final and won in straight sets to claim his second season-ending championship. In an era when tournament prize money was rising sharply due to the competition between two circuits (Grand Prix and WCT), Lendl's title victories quickly made him the highest-earning tennis player of all time. At the French Open, Lendl lost to
Mats Wilander in five sets in the fourth round. "I was missing a little the timing on my forehand and it was difficult for me to play without it. I did my best and I was trying hard but I was outplayed" said Lendl afterwards. Lendl reached his first
US Open final in 1982, beating McEnroe in the semi finals in straight sets. Lendl was "in peak form, finding the corners and the lines with his ferocious forehand and making infrequent but successful forays to the net". He was defeated in four sets in the final by
Jimmy Connors, not being able to cope "with Connors' penetrating, sharply-angled groundstrokes into the corners, or his net-charging attacks".
1983 Lendl won another seven tournaments in 1983; however, he had not won any
Grand Slam titles in the early years of his career. He lost in the quarter finals of the French Open in four sets to eventual winner
Yannick Noah, which "produced some of the best tennis of the tournament" to that point. He lost in the Wimbledon semi finals to John McEnroe in straight sets; "McEnroe's serve, depending more on placement and spin rather than brute strength, was more effective" than Lendl's. He was the runner-up at the US Open (losing in four sets to Connors). and Australian Open (losing in straight sets to Mats Wilander; the fourth time he had lost a Grand Slam singles final). In July 1983, Lendl played three exhibition matches (against
Johan Kriek,
Kevin Curren, and
Jimmy Connors) in
Sun City, South Africa, in the
apartheid-era
bantustan of
Bophuthatswana. The Czechoslovak Sport Federation (ČSTV), controlled by the Communist Party, expelled him from the Czechoslovak
Davis Cup team and fined him $150,000. Lendl disputed the punishment and the fine.
1984 In 1984, Lendl bought his own house in
Greenwich, Connecticut. Lendl's first Grand Slam title came at the
1984 French Open, where he defeated McEnroe in a long final. Down two sets to love, Lendl came back to claim the title in five sets. After the match Lendl said "John was playing great in the first two sets. He was hitting corners and lines all the time. Then I think he got a little tired. I was in better shape today and could run all day long". Lendl lost in four sets in the Wimbledon semi finals to Jimmy Connors. McEnroe defeated Lendl in straight sets in the final of the US Open. Playing with a heavily bandaged stomach due to a pulled stomach muscle, Lendl lost in straight sets in the fourth round of the Australian Open to
Kevin Curren. He lost to McEnroe in
Volvo Masters final.
1985 Lendl lost in the final of the
1985 French Open to
Mats Wilander. At Wimbledon Lendl lost in the fourth round to Henri Leconte in an event when his serve was "out of sync". He then faced McEnroe again in the final of the US Open, winning in straight sets. He described the victory by saying, "Being that I beat John McEnroe, it's that much sweeter". He had trained and practiced vigorously with new coach Tony Roche since his defeat to McEnroe in the previous year's final. He reached the
WCT Finals for the second and last time, defeating
Tim Mayotte in three sets. He also won the Masters Grand Prix title for the third time, defeating
Boris Becker in straight sets. He was upset by 19-year-old and No. 6
Stefan Edberg in the semifinals of the
1985 Australian Open in an epic match spread over two days.
1986 Lendl won the French Open title in 1986, defeating Mikael Pernfors in the final. He reached the Wimbledon final for the first time, winning long five set matches against Tim Mayotte in the quarters and
Slobodan Živojinović in the semis, but lost to Boris Becker in straight sets. At the US Open, Lendl defeated Edberg in straight sets in the semi finals and overpowered Miloslav Mecir from the baseline and passed Mecir when he came to the net, winning the final in straight sets. Lendl defeated Becker in straight sets in the season-ending Masters final. "It was Lendl, the teacher, against Becker, the young pupil". Lendl lost only 12 points on his serve in 15 service games.
1987 Lendl lost in the 1987 Australian Open semi finals to Pat Cash. He won the French Open, beating Wilander in a four-set final that finished in semi-darkness and pouring rain. At Wimbledon he beat Edberg in the semi finals in four sets In round one of the US Open, Lendl achieved the first ever men's singles US Open triple bagel win in beating Barry Moir in 71 minutes. In the final, Lendl was suffering from influenza, but outlasted Wilander in a match lasting 4 hours and 47 minutes (the longest singles final in the tournaments history, surpassed the following year). Lendl won the Masters Grand Prix championship title in three sets over Wilander. This took him to his fifth and last Grand Prix year-end tour title. In each year from 1985 to 1987, Lendl's match-winning percentage was over 90%. This record was equalled by
Roger Federer in 2004–2006, but Lendl remains the only male tennis player with over 90% match wins in five different years (1982 was the first, 1989 the last). From the 1985 US Open to the 1988 Australian Open, Lendl reached ten consecutive Grand Slam singles semifinals – a record that was broken by Federer at the 2007 Australian Open.
1988 At the 1988 Australian Open, Lendl lost to Cash in the semi-finals in five sets and struggled with the heat in the later stages of the match. At the French Open, Lendl defeated John McEnroe before losing in straight sets to Jonas Svensson in the quarter finals. At Wimbledon, Lendl lost in the semi-finals to Becker in four sets. Lendl reached his only Grand Slam final of the year at the US Open, losing the final to Wilander in five sets in 4 hours 54 minutes (the longest US singles final to that point).
1989 Lendl began 1989 by winning his first Australian Open title with a straight-sets final victory where he "overpowered"
Miloslav Mečíř in a match when the court surface temperature reached 135 degrees. He went on to win 10 titles out of 17 tournaments he entered. At the
French Open, Lendl was upset in the fourth round by 17-year-old
Michael Chang, a five-set match that took 4 hours and 37 minutes; Chang went on to win the tournament for what turned out to be his sole career Grand Slam title. At Wimbledon, Lendl reached the semi-finals and led Becker by 2 sets to 1 and a break before losing in five sets. "His volleying is much better; he's picking up a lot more balls. Today I had a very good backhand. Lendl should have mixed his serves more", said Becker after the match. Lendl lost the US Open final to Becker in four sets, which was the last of eight consecutive US Open finals that Lendl contested.
1990 Lendl successfully defended his Australian Open title in 1990 when Edberg retired in the final. That season, Lendl put in intensive efforts to train and improve his grass court game. He switched to a larger-headed racket and skipped the
1990 French Open to spend more time practising on grass. He won the
Queen's Club Championships, with comfortable straight-set victories over McEnroe in the semi-final and Becker in the final, but was unable to reproduce this form at Wimbledon, and although he reached the semi-finals for the seventh time in eight years, he looked "tight and inhibited" in losing to eventual champion
Stefan Edberg in straight sets. Wimbledon became the only Grand Slam singles title Lendl never managed to win. At the US Open, Lendl "was not at the top of his game" when losing to 19 year old
Pete Sampras in the quarter finals in five sets.
1991 Lendl remained near the top of the rankings in 1991. In the semi finals of the Australian Open in January that year, Edberg served for the match against Lendl leading 5-4 in the fourth set and had two match points but went on to lose in five sets. Lendl lost the final in four sets to Becker, which was Lendl's last Grand Slam final. To date, only Djokovic, Federer, and Nadal have ever reached more Grand Slam men's singles finals than Lendl. Lendl served 23 aces in beating reigning US Open champion Sampras in five sets to win the US Pro indoors final in Philadelphia. Lendl skipped the French Open again to focus on Wimbledon, but lost in the third round against
David Wheaton, and was never to win the Wimbledon title. At the US Open, he lost in straight sets in the semi-finals to Edberg.
1992–1994 In 1992, Lendl's best performances in Grand Slams were quarter finals at the Australian Open and US Open, where he lost to Edberg in five sets in both matches (at the US Open, Lendl led by a break in the fifth set before losing). Lendl announced his retirement from professional tennis on December 21, 1994, aged 34, due to chronic back pain. His last professional match prior to that had been his defeat in the second round of the US Open in 1994, three and a half months earlier. Lendl won a career total of 94 ATP singles titles (plus 57 other non-ATP tournaments, a total of 151 singles titles) and 6 doubles titles, and his career total prize money of U.S. $21,262,417 was a record at the time. In 2001, he was inducted into the
International Tennis Hall of Fame. ==Post-retirement activity==