Jannik Sinner becomes world number one and reaches French Open semi-finals

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).

Jannik Sinner is in the semi-finals at Roland Garros (Christophe Ena/AP)

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.