Daniil Medvedev officially moved up to No 1 in the ATP rankings on Monday, overtaking Novak Djokovic to become the 27th man to hold the top spot since computerized rankings began in 1973.

Medvedev, a 26-year-old from Russia who won last year's US Open and was the runner-up at this year's Australian Open, rose from No 2.

Djokovic slid down one place after having participated in only one tournament in 2022 because he has not been vaccinated against COVID-19. He was deported from Australia and not allowed to try to defend his title at Melbourne Park because he is not inoculated－and has said he won't get the shots, even if he needs them to be able to play elsewhere, such as the French Open or Wimbledon.

Medvedev is the first player other than Djokovic, Roger Federer, Rafael Nadal or Andy Murray to get to No 1 since February 2004, when Andy Roddick was there.

Medvedev is also the first new No 1 since Murray in November 2016 and the third Russian man to lead the rankings, following Yevgeny Kafelnikov and Marat Safin.