The World number one beat Croatian Donna Vekic 6-3 4-6 7-6 (7-4) at the Porsche Tennis Grand Prix.
Osaka will now face Anett Kontaveit, who was able to progress after Victoria Azarenka retired.
Petra Kvitova will face Kiki Bertens in the other semi-final.
Sinner beats Lehecka in Miami final to capture 'Sunshine Double'
Jannik Sinner beat Czech Jiri Lehecka 6-4 6-4 in a rain-hit Miami Open final on Sunday to become the first man to complete the coveted 'Sunshine Double' without dropping a set.
Pakistan board charges Fakhar Zaman with ball‑tampering in PSL match
Lahore Qalandars batter Fakhar Zaman has been charged with ball-tampering in Sunday's Pakistan Super League (PSL) match against Karachi Kings, the Pakistan Cricket Board (PCB) said in a statement.
France showcase firepower and squad depth in Colombia win
Desire Doue scored twice as France showcased their attacking firepower and strength in depth with a 3-1 friendly win over Colombia on Sunday, in their final outing before coach Didier Deschamps names his World Cup squad.
Egypt national team director warns Salah against MLS move
Egypt's national team director Ibrahim Hassan has cautioned Mohamed Salah against moving to Major League Soccer after he leaves Liverpool at the end of the season as it would see the forward fade into obscurity.
Alex Fitzpatrick makes history with maiden title in India
Alex Fitzpatrick has surged to his maiden DP World Tour victory after a stunning final nine holes to overhaul defending champion Eugenio Chacarra at the 2026 Hero Indian Open.
