Viktor Troicki started his bid to win a second ATP World Tour title of the year by reaching the quarter-finals of the Sofia Open with a victory over Daniel Brands on Thursday.
Troicki wasted no time in claiming his first title of the year when he retained his Sydney International crown last month and the second seed is eyeing another triumph in the Bulgarian capital.
The Serb saw off Daniel Brands 6-4 6-3 at Arena Armeec Sofia after being given a first-round bye and felt the qualifier played to his strengths.
"He has a very aggressive game, which I usually like to play against and that's maybe why I played really well," said Troicki
Troicki had to wait until the 10th game of the match to claim the break which sealed the first set and a solitary break in the second was enough to see him through to the last eight.
Top seed Roberto Bautista Agut has the luxury of being in the quarter-finals without playing a match after Filip Krajinovic pulled out of their last 16 match due to a shoulder injury, with the Spaniard also given a first-round bye.
Andreas Seppi, seeded four, wasted no time in beating Thiemo De Bakker 6-2 6-1 in a one-sided encounter, but fifth seed Philipp Kohlschreiber had to tough it out in a 6-1 4-6 6-3 win over Damir Dzumhur.
Sixth seed Gilles Muller was given a sterner examination by Ricardas Berankis, but prevailed 7-5 7-6 (7-4) and Adrian Mannarino came through a three-setter against qualifier Marius Copil.