Top seed Tomas Berdych stayed on course to win his first ATP World Tour title of the season by beating fellow-Czech Jiri Vesely to reach the semi-finals of the Shenzhen Open.
Berdych needed just an hour and 35 minutes to triumph 6-3 6-2 and secure his place in the last four of a tournament for the eighth time at tour level in 2015.
Vesely had his chances in the first match between the countrymen, but was unable to win any of the four break points he earned, while the clinical Berdych broke three times to set up a semi-final against Tommy Robredo.
World number five Berdych is poised to qualify for the season-ending ATP World Tour Finals for a sixth successive year and appears to be the man to beat this week.
The 30-year-old broke the Vesely serve to take the upper hand in the first set at 3-1 and faced just one break point on his way to wrapping up the set.
Berdych then claimed a second break of the match to lead 2-1 in the second set and another to stand on the brink of victory at 5-2, then although the favourite made hard work of serving for the match he got the job done after fending off three break points.
Third seed Robredo recovered from a poor start to beat Simone Bolelli 1-6 6-2 6-4 to set up an 11th encounter with Berdych.
Experienced Spaniard Robredo fired down seven aces and needed just three breaks of serve to oust the unseeded Bolelli.
Marin Cilic also reached the semi-finals on Friday at the expense of Hyeon Chung, who was beaten 7-6 (8-6) 6-4.
Cilic, another player striving to secure his place in the ATP World Tour Finals, racked up 15 aces and broke three times to the two Korean teenager Chung came up with to ensure he will face Guillermo Garcia-Lopez in the last four.
Garcia-Lopez should be relatively fresh for the semi-final after he was given a quarter-final walkover when Adrian Mannarino pulled out of the match due to a leg injury.