Fifth-seeded Hubert Hurkacz has triumphed over fourth-seed Jannik Sinner 6-3 6-3 in the day's second quarter-final on centre court.
Earlier, second seed Andrey Rublev progressed beating Mackenzie McDonald 6-2 3-6 1-6.
The second semi-final places will go to the winners of the final two quarter-final matches, the first between top seed and world number one Novak Djokovic and qualifier Jiri Vesely, followed by Ricardas Berankis and sixth seed Denis Shapovalov.
UAE, Saudi Arabia set for Gulf Cup final showdown
The UAE face hosts Saudi Arabia in the final of the 27th Arabian Gulf Cup on Tuesday in Jeddah, with both sides aiming to end long waits for regional football's most prestigious title.
Alcaraz sinks Lehecka to retain Japan Open crown
Defending champion Carlos Alcaraz defeated unseeded Czech Jiri Lehecka 7-6(4) 6-4 in the Japan Open final on Tuesday to retain his title and continue his resurgence after a wrist injury.
McIlroy set for Dubai return at DP World Tour Championship in November
Seven-time Race to Dubai champion Rory McIlroy will tee it up at the DP World Tour Championship from November 12-15 at Jumeirah Golf Estates in Dubai, as he bids to draw level with Colin Montgomerie's record haul of eight Harry Vardon Trophies.
Kaur steps down as India women's team captain
World Cup-winning skipper Harmanpreet Kaur announced on Tuesday her decision to step down from her role as captain of the Indian women's team in all formats.
Gauff hits out at racist abuse after replayed point in Beijing sparks backlash
Coco Gauff said she had received an "insane" amount of racial abuse on social media after the two-times Grand Slam champion beat local teenager Sun Xinran at the China Open on Monday in a match where a replayed point sparked an online backlash.
