SHENZHEN, China (AP) Viktor Troicki of Serbia upset top-seeded David Ferrer of Spain 6-3, 6-4 to reach the quarterfinals of the Shenzhen Open on Thursday.
Troicki hit 13 aces and converted two of his five break points to record his first win in four attempts against Ferrer.
The Serb will next face sixth-seeded Santiago Giraldo of Colombia, who beat qualifier Thanasi Kokkinakis of Australia 6-4, 6-3.
Giraldo withstood 11 aces from Kokkinakis, who was playing just his eighth tour-level match.
Second-seeded Andy Murray of Britain coasted to 6-3, 6-3 win over Somdev Devvarman of India and will next face Luksa Lacko of Slovakia.
Lacko beat Ricardas Berankis of Lithuania 6-4, 7-6 (1). The Slovakian saved four of the five break points he faced to earn his 14th tour-level win of the season.