Novak Djokovic was denied his first title of the year on Sunday, the world number one admitting he "ran out of gas" in a three sets defeat to Russia's Andrey Rublev in the final of the Serbia Open. Second seed Rublev won 6-2, 6-7 (4/7), 6-0 against the top seed who had been looking to regain winning form before his French Open title defence next month. The Belgrade event in his hometown was only Djokovic's third of 2022 after he was deported from Melbourne - and denied the chance to defend his Australian Open title - after entering the country unvaccinated.