Fourth-seeded Tommy Robredo of Spain outlasted eighth-seeded Andreas Seppi of Italy 6-4, 6-7 (5), 6-3 to reach the Shenzhen Open semi-finals on Friday.
Robredo hit 19 aces in the 2-hour, 36-minute quarter-final at Shenzhen Longgang Sports Center.
He awaits either qualifier Viktor Troicki of Serbia or sixth-seeded Santiago Giraldo of Colombia.
Second-seeded Andy Murray faced Lukas Lacko of Slovakia late Friday. Murray was looking for a strong showing in the three-week Asian swing to improve his chances of qualifying for the ATP Finals in London next month.