Ivan Lendl (Czech pronunciation: [ˈɪvan ˈlɛndl̩]; born March 7, 1960) is a former world no.1 professional tennis player. Originally from Czechoslovakia, he became a United States citizen in 1992. He was one of the game's most dominant players in the 1980s and remained a top competitor into the early 1990s. He has been described as one of the greatest tennis players of all time. Lendl's game relied particularly on strength and heavy topspin from the baseline and helped usher in the modern era of "power tennis".
Lendl captured eight Grand Slam singles titles. He competed in 19 Grand Slam singles finals, a record surpassed by Roger Federer in 2009 and Rafael Nadal in 2014. He reached at least one Grand Slam final for 11 consecutive years, a record shared with Pete Sampras, with the male primacy of eight consecutive finals in a Grand Slam tournament (a record shared with Bill Tilden at the US Open). Before the formation of the ATP, Lendl reached a record 12 year-end championships (equalled by John McEnroe). He won two WCT Finals titles and five Masters Grand Prix titles, with the record of nine consecutive finals. He also won a record 22 Grand Prix Super Series titles (1980–89), the precursors to the current ATP Masters 1000.