Serbia's Viktor Troicki swept into the quarter-finals of the Malaysian Open in straight sets on Thursday, joined by former champion Nikolay Davydenko in the last eight.
Second seed Troicki beat Denis Istomin of Uzbekistan 6-1, 6-4 while 2009 champion Davydenko put out Poland's Lukasz Kubot 6-3, 7-6 (7/2) indoors at the Putra stadium.
Troicki, a member of the Serbian team that lost to Argentina in the Davis Cup semi-finals, earned revenge for a defeat at the hands of Istomin in the 2010 New Haven semi-finals.
"I lost to him in a strange match last year. I knew I had to play more offensive and take my chances when they came," said the 15th-ranked Serb, who will next face Russian Dmitry Tursunov.
"Today in the first set I played pretty well and stayed in control. The second set was equal. I was a bit more focused at the end and broke to win the match."
Davydenko, who reached a career-high of three in the world rankings but has slumped to 36th, beat Kubot in just over 90 minutes, with both players struggling on serve in a match peppered with double-faults.
The Russian awaits the winner from the match between Serbian third seed Janko Tipsarevic and Italy's Flavio Cipolla.
Top seed Nicolas Almagro of Spain was due to get his tournament under way against compatriot Albert Ramos.