Second seed Daniil Medvedev had no problems seeing off Dusan Lajovic at the Kremlin Cup, while Nick Kyrgios pulled out due to injury.
Local hero Medvedev required only 53 minutes to see off Serb Lajovic 6-2, 6-1.
Next up for the Russian is Richard Berankis after the Lithuanian came through a tough three-set marathon against Aljaz Bedene on Wednesday.
The second quarter-final of the bottom half of the draw will see Mirza Basic up against Russian third seed Karen Khachanov.
Bosnian Basic advanced after fifth seed Kyrgios from Australia withdrew from the tournament due to an elbow problem.
In the top half, fourth seed Filip Krajinovic booked his place in the last four with a 7-5, 6-4 win over Evgeny Donskoy and next up for the Serb is Andreas Seppi after the Italian beat Pierre-Hugues Herbert from France 7-6 (8-6), 7-6 (7-5).
Plenty of positives for Andy Murray.
Kevin Palmer on Roger Federer’s SW19 breakthrough.
The fallout from the controversial Adria Tour continues.
Where to get your Wimbledon fix this year.
Nemanja Matic firmly in Novak Djokovic’s corner.
No holding back from Nick Kyrgios.
Lewis discusses Wimbledon prospects.
German breaks self-isolation vow.
The world No 28 maintains unbeaten record.
The former world number one was beaten by Dan Evans int he last four.