The crossword solution for the term 'Tennis Great Ivan' is LENDL, which is a five-letter word. Ivan Lendl is a former professional tennis player from Czechoslovakia who was one of the game's leading players in the 1980s and early 1990s. He won eight Grand Slam singles titles and was world No. 1 for 270 weeks. He also reached the finals of all four Grand Slam tournaments a total of 11 times. Lendl is considered to be one of the greatest tennis players of all time.