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.
Leclerc laps fastest for Ferrari in first US GP practice
Ferrari's Charles Leclerc lapped fastest in first practice for the US Grand Prix at Austin's Circuit of the Americas on Friday with Mercedes' championship leader Kimi Antonelli only fifth.
Bayern coach Kompany hospitalised after collapsing during training session
Bayern Munich coach Vincent Kompany was rushed to hospital on Friday after collapsing during a training session, the German champions said.
Alexander Volkanovski's title defence headlines UFC 333 in Abu Dhabi
The UFC returns to Abu Dhabi on Saturday for UFC 333, which will be highlighted by a championship doubleheader.
Juventus fight back to draw with Rennes as Leverkusen go top
Juventus dropped their first points of the Europa League campaign after coming from behind to draw 2-2 with visitors Rennes on Thursday.
South Africa level test series with big win over Australia
South Africa bowled out Australia for 295 to win by an innings and 31 runs in the last session of the second test at St George’s Park in Gqeberha on Thursday to level the three-match series, winning a race against looming bad weather.
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Pinoy Expat Corner
In the fight against cancer, how important is having a strong support system—family, friends, and the community?
Pinoy Expat Corner
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Pinoy Expat Corner
What should beginners know before getting into off-roading? What type of vehicle is ideal for off-road adventures?
