Speaking after cruising into the third round of the Shanghai Masters with a 6-3, 6-2 win over Bulgaria’s Grigor Dimitrov , the Serbian said: “I didn’t have a childhood school education as probably most of my generation did in Serbia and around the world.

“I never went to university,” he added. “Well, if I can say, that’s one wish that I have in life, one regret, that I would like to go in some university.”