Novak Djokovic surrenders world number-one spot to Daniil Medvedev after defeat

Novak Djokovic was beaten by Jiri Vesely in Dubai (Kamran Jebreili/AP)

Novak Djokovic will be overtaken as world number one by Daniil Medvedev on Monday after a shock loss to Jiri Vesely in the quarter-finals of the Dubai Duty Free Tennis Championships.

Playing his first tournament of the year following his deportation from Australia, Djokovic was relatively comfortable in his first two matches.