Novak Djokovic (Serbian: Новак Ђоковић / Novak Đoković, pronounced [nôvaːk dʑôːkovitɕ] ; born 22 May 1987) is a Serbian professional tennis player. He has been ranked as the world No. 1 in men's singles by the Association of Tennis Professionals (ATP) for a record 428 weeks across a record 13 different years, and finished as the year-end No. 1 a record eight times. Djokovic has won a record 24 Grand Slam men's singles titles, including a record ten Australian Open titles.
https://en.wikipedia.org/wiki/Novak_Djokovic