Karol Beck of Slovakia has upset third-seeded Viktor Troicki of Serbia 7-6 (4), 4-6, 6-4 in the first round of the St. Petersburg Open.
Troicki leveled at a set apiece on Monday after breaking in the 10th game of the second set.
Beck, the 2004 runner-up, set up his victory with a break in the seventh game of the third set. Troicki also lost in the tournament’s opening round last year, falling to eventual champion Andy Murray of Britain.
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Bjorn Phau of Germany also advanced, beating Russian wild card Stanislav Vovk 6-3, 6-2 while Rainer Schuettler of Germany, the 2001 runner-up, was ousted by Denis Istomin of Uzbekistan 6-4, 6-4.
Mikhail Youzhny leads the field after winning the Kremlin Cup last week for his fifth career title. He won the event in 2004.