Ivan Lendl has played in a tennis game.
The ATP World Tour Masters 1000 ( previously known as the ATP Championship Series , Single-Week , ATP Super 9 , Tennis Masters Series , and ATP Masters Series ) is the third highest tier of men 's tennis tournament after the four Grand Slam tournaments and ATP World Tour Finals . Ivan Lendl . He finished four years ranked as the world 's top player ( 1985 -- 1987 and 1989 ) and was ranked No. 1 for a total of 270 weeks and set a new record previously held by Jimmy Connors , since broken by Pete Sampras and Roger Federer .