Novak Djokovic can become only the second man in history to have twice held all four Grand Slam titles at the same time with victory at the French Open. However, a returning Roger Federer and rejuvenated Rafael Nadal will once again stand in his way.

World No. 1 Djokovic completed his first private stranglehold of all four Slams with victory at Roland Garros in 2016. Having clinched the 2018 Wimbledon and US Open titles and then a seventh Australian Open crown in January this year, the Serb is tantalisingly close to another 'Djoko Slam'.