Sergiy Stakhovsky proved to be no match for fifth seed Philipp Kohlschreiber in the first round of the inaugural Sofia Open on Tuesday.
Kohlschreiber has six ATP titles to his name during his 15-year career as a professional and the German is eyeing his first triumph of 2016 this week.
The 32-year-old overcame the unseeded Stakhovsky 6-2 6-2 in only an hour and nine minutes at the Arena Armeec Sofia.
Kohlschreiber claimed four breaks in the first set and another two in the second to cruise into the last 16 of the first ATP World Tour event to be staged in the Bulgarian capital.
Gilles Muller, the only other seed in action on day two of the tournament, was also a comfortable first-round winner over Tunisian Malek Jaziri.
Muller, seeded six, came up with 16 aces in an impressive display of serving and the world number 42 did not face a single break point in a one-sided encounter.
Marius Copil earned a place in round two at the expense of Hyeon Chung, who is ranked 158 places above the Romanian qualifier but was beaten 6-2 6-3.
Thiemo De Bakker, Damir Dzumhur and Filip Krajinovic were also first-round winners on Tuesday - with the latter facing top seed Roberto Bautista Agut in the second round.