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.


Italy crush Nepal in maiden T20 World Cup victory
Dubai Duty Free Tennis Championships reveals major expansion plan
Sri Lanka crush Oman for second victory in T20 World Cup
Philippine's rising star Alexandra Eala to debut at Dubai Tennis Open
Messi suffers muscle strain, Miami reschedule preseason finale
