GSTAAD, Switzerland — Juan Monaco held his nerve in a tight final set to upset third seed Guillermo Garcia-Lopez 6-2, 2-6, 6-4 Wednesday for a second consecutive place in the quarterfinals at the Swiss Open. The Argentine, whose ranking has dropped to 105, won his sixth of eight meetings with Garcia-Lopez, whom he also beat in the second round in Gstaad a year ago. The unseeded South American missed his first chance to serve out victory in the concluding set but came through into the last eight on his second opportunity two games later, going through on his second match point. He stands outside the top 100 for the first time in more than eight years. In a first-round match interrupted by darkness Tuesday, Swiss wild card Henri Laaksonen defeated Gianni Mina of France 7-6 (7/5), 7-6 (7/3). Cilic, Rosol in last 8 In Umag, third-seeded Marin Cilic of Croatia beat Dutchman Igor Sijsling 7-5, 6-3 Wednesday to reach the quarterfinals of the Croatia Open. Fifth-seeded Czech Lukas Rosol also reached the quarterfinals, defeating Spaniard Pere Riba 7-6 (4), 6-1. Spain's Pablo Carreno Busta advanced by walkover after eighth-seeded Carlos Berlocq of Argentina withdrew because of an injury. On Tuesday, Rosol needed a late rally to beat 100th-ranked Diego Sebastian Schwartzman 6-3, 3-6, 7-6 (2) in the first round. Spaniard Albert Montanes cruised to a 6-4, 6-4 victory over teenager Alexander Zverev and Berlocq beat Slovakia's Andrej Martin 7-6 (4), 6-3. Sixth-seeded Andreas Seppi, a three-time semifinalist at Umag, also advanced after beating fellow Italian Marco Cecchinato 6-2, 6-7 (2), 6-1. In the late matches, Albert Ramos-Vinolas of Spain defeated Frenchman Benoit Paire 7-5, 6-3, while another Spaniard, Pere Riba, rallied to beat Jiry Vesely of the Czech Republic 6-7 (7), 6-3, 6-3. Sijsling also booked a place in the second round, beating Germany's Julian Reister 7-6 (2), 6-7 (3), 6-2. In other matches, Argentine qualifier Horacio Zeballos beat Croatian wild card entrant Ante Pavic 6-4, 6-7 (2), 6-1, while Teymuraz Gabashvili of Russia beat Serbia's Dusan Lajovic 6-4, 6-3. Uruguayan Pablo Cuevas came from a set down to defeat Mate Delic of Croatia 4-6, 6-4, 6-4. Bojanovski, Peer in quarters Former champion Bojana Jovanovski of Serbia returned to the Baku Cup quarterfinals by beating Katarzyna Piter of Poland 6-3, 6-1 Wednesday. Jovanovski will meet surprise Japanese Misa Eguchi, who qualified for her first WTA main draw this week, then beat No. 3-seeded Magdalena Rybarikova and Urszula Radwanska in straight sets. Pauline Parmentier of France reached her first quarterfinals since 2012 after ousting eighth-seeded Jana Cepelova of Slovakia 7-6 (2), 6-4 in a match with 11 service breaks, and Shahar Peer of Israel, last year's runner-up, defeated Vesna Dolonc of Serbia 3-6, 6-2, 6-3. Sock moves up Jack Sock of the United States beat Colombia's Alejandro Gonzalez 6-2, 6-4 in the first round of the Atlanta Open Tuesday. Sock finished off Gonzalez in 1 hour, 6 minutes by winning 89 percent of his quality first serves, and relying on his forehand to break Gonzalez's serve twice in the first set and once in the second. Eight of the first nine first-round matches lasted two sets Tuesday. In the only three-set match, Robby Ginepri fought off eight of 11 break points to beat Sergiy Stakhovsky of Ukraine 7-6, 3-6, 6-0. No. 6-seeded Denis Istomin of Uzbekistan beat Rajeev Ram 6-1, 6-4, eight-seeded Marinko Matosevic of Australia downed Victor Estrella Burgos of the Dominican Republic, 6-0, 6-2 and Slovakia's Lukas Lacko beat Nathan Pasha 6-2, 7-5. Tim Smyczek beat fellow American Ryan Harrison 6-0, 6-2, while Benjamin Becker of Germany defeated Australia's Matthew Ebden 6-4, 6-2. — Agencies