seeded Juan Monaco of Argentina beat Jan Hernych of the Czech Republic 6-2, 5-7, 7-5 in the first round of the Stockholm Open Monday. Monaco failed to convert three match points before dropping the second set to Hernych. The Argentinian then led 5-2 in the third but Hernych fought back to 5-5 before Monaco clinched the win. In just his second appearance on the ATP tour this year, Sweden's Joachim Johansson relied on his powerful serve to beat Australia's Peter Luczak 7-5, 6-2. Simon Greul beat fellow German Benjamin Becker 2-6, 6-3, 7-5 to advance to the second round. He will face Spaniard Guillermo Garcia-Lopez, who beat compatriot Alberto Martin 6-3, 6-2. Argentina's Leonardo Mayer also advanced after defeating seventh-seeded Albert Montanes of Spain 6-4, 6-3. Petrova, Youzhny advance In Moscow, fifth-seeded Nadia Petrova of Russia easily advanced to the second round of the Kremlin Cup, beating her compatriot, teenager Yana Buchina, 6-2, 6-0 Monday. In the men's first round, third-seeded Mikhail Youzhny, also of Russia, defeated Horacio Zeballos of Argentina 6-1, 7-6 (5). The 17th-ranked Petrova had little trouble against Buchina, runner-up at the junior US Open, who was playing in her first WTA Tour event courtesy of a wild card. Petrova, runner-up in 2006, broke Buchina twice in the first set and closed out the match in just 48 minutes. In the next round Petrova will face Alona Bondarenko of Ukraine, who beat the 2006 champion Anna Chakvetadze 6-4, 6-3. Later, Maria Jose Martinez Sanchez of Spain beat seventh-seeded Dominika Cibulkova of Slovakia, 6-2, 6-2. Youzhny, who is looking for his first title this season, won six consecutive games to take the first set but had a harder time in the second. Zeballos saved two match points on a second-set tiebreaker before Youzhny closed out the match with a forehand winner.