Jannik Sinner became world number one without knowing it as he reached the semi-finals of the French Open for the first time.
While the Italian was beating Grigor Dimitrov in straight sets, Novak Djokovic withdrew from the tournament with a knee injury.
Djokovic’s departure means Sinner will rise above the Serbian to the top of the rankings when they are updated on Monday.
The 22-year-old, who is the first man from Italy to be world number one, sank Bulgarian veteran Dimitrov 6-2 6-4 7-6 (3).
“First of all it’s every player’s dream to be number one in the world,” he said.
“But in the other way to see Novak retiring for everyone is disappointing, so I wish him a speedy recovery.
“My performance was very solid, especially the first two sets. I’m very happy how I reacted later and happy to be in the semis.
“It’s going to be a huge pleasure to step once again on this court.”