Serbian tennis player Novak Djokovic (C), accompanied by his father Srdjan Djokovic (L) and his mother Dijana Djokovic, celebrates 311 weeks as world number one with his family and supporters in front of family restaurant "Novak" in Belgrade, on March 8, 2021. Novak Djokovic set a new landmark of 311 weeks as world number one on March 8, 2021, one week longer than Roger Federer whose tally of a record 20 Grand Slam titles is now firmly in the Serb's sights. "Big day today," the tennis superstar wrote on Twitter. Djokovic, 33, won his 18th major at the Australian Open in February.,Image: 596070758, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Profimedia

PARIS, FRANCE - JUNE 05: Novak Djokovic of Serbia celebrates victory with his parents, Dijana and Srdan Djokovic during the Men's Singles final match against Andy Murray of Great Britain on day fifteen of the 2016 French Open at Roland Garros on June 5, 2016 in Paris, France. (Photo by Julian Finney/Getty Images)

(FromL) The Djokovic family, Novak's mother Dijana, Novak Djokovic, Novak's brother Djordje, Novak's father Srdjan and Novak's wife Jelena pose during the finals of the Adria Tour, Novak Djokovic's Balkans charity tennis tournament in Belgrade on June 14, 2020. The ATP and WTA Tours have been suspended since March due to the COVID-19 pandemic and will not resume at least until the end of July 2020.,Image: 531588175, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Profimedia