Italian tennis star and three-time Grand Slam champion, Jannik Sinner, has reached his 45th consecutive week as the world`s number one ranked player as of April 14th. Since first reaching the top spot, the 23-year-old Sinner has maintained his position, achieving the fifth longest unbroken streak at world number one since the ATP rankings began in 1990, according to Opta Ace.
Longest Consecutive Runs as ATP Rank #1 (Since 1990):
– Roger Federer (Switzerland) – 237 weeks
– Lleyton Hewitt (Australia) – 75 weeks
– Novak Djokovic (Serbia) – 53 weeks
– Rafael Nadal (Spain) – 46 weeks
– Jannik Sinner (Italy) – 45 weeks
Marcus Blakely 
Gilbert Pendleton