London, England - Two-time champion Rafael Nadal, seven- time titlist Roger Federer and Australian Open winner Stan Wawrinka posted second-round victories Thursday at Wimbledon. Swell Fles . The second-seeded world No. 1 superstar Nadal exacted some revenge by coming back to beat Czech Lukas Rosol 4-6, 7-6 (8-6), 6-4, 6-4 on the famed Centre Court. Rosol shocked Nadal in the second round here two years ago, and Nadal was a first-round loser against Belgian Steve Darcis in the opening round last year. Rosol had a set point in the second-set tiebreak but was unable to convert, as Nadal saved it with a forehand winner and Rosol double-faulted two points later to give the Spaniard the set. Nadal ultimately completed his comeback in 2 hours, 44 minutes. The big-serving 6-foot-5 Rosol popped 17 aces, compared to 11 for Nadal, who broke his Czech counterpart three times, compared to two breaks for the loser. Nadal has now beaten Rosol twice since losing to the Czech slugger here in 2012. The mighty Spaniards other win came in Doha, Qatar, back in January. "I never play for revenge. Every match is a different match. My goal is not to beat Rosol but to play as well as I can in the tournament," Nadal said. The 14-time Grand Slam champion Nadal, who is the reigning French and U.S. Open titlist, is now 38-7 lifetime at Wimbledon, where hes a two-time winner and three-time runner-up. Up next for the 28-year-old great will be Kazakhstans Mikhail Kukushkin. The fourth-seeded former world No. 1 great Federer eased past Luxembourgs Gilles Muller 6-3, 7-5, 6-3 under the roof on Centre Court. Rain forced the closure of the roof during the second set. Federer improved to 69-8 lifetime at The Championships, where he also finished as a runner-up in 2008 in addition to those seven titles. The 17-time Grand Slam king titled on grass in Halle two weeks ago. He awaits the Marcel Granollers-Santiago Giraldo winner. The fifth-seeded Swiss star Wawrinka moved on by striking 56 winners and holding off Taiwans Yen-Hsun Lu, 7-6 (8-6), 6-3, 3-6, 7-5. Wawrinka will meet Uzbekistans Denis Istomin on Saturday. In other action involving top-10 seeds, No. 8 Milos Raonic, of Canada, reached the third round at Wimbledon for the first time by humbling American Jack Sock 6-3, 6-4, 6-4, No. 9 American John Isner erased veteran Finnish left-hander Jarkko Nieminen 7-6 (19-17), 7-6 (7-3), 7-5, and No. 10 Kei Nishikori, of Japan, erased American Denis Kudla 6-3, 6-2, 6-1. The youngest player in the mens draw, 19-year-old Aussie Nick Kyrgios, pulled off an impressive upset by coming from two-sets-to-love down to eliminate 13th-seeded Frenchman and former Wimbledon semifinalist Richard Gasquet, 3-6, 6-7 (4-7), 6-4, 7-5, 10-8. Kyrgios smacked 21 aces and saved nine match points in the remarkable victory on the No. 2 Court. The Aussie needed 3 hours, 53 minutes to advance, as Gasquet ripped 27 aces in a losing effort. In a match that was suspended because of darkness on Wednesday, 14th-seeded French star Jo-Wilfried Tsonga finished off American Sam Querrey 4-6, 7-6 (7-2), 6-7 (4-7), 6-3, 14-12. The two men returned to the court knotted at 9-9 in the final set on Thursday. Tsonga and Querrey combined for 70 aces, including 37 from the French winner, in the two-day, 3-hour, 49-minute affair. The match featured only three service breaks, with Tsonga gaining two of them. Italian Simone Bolelli took out 22nd-seeded German Philipp Kohlschreiber 4-6, 6-4, 6-3, 2-6, 7-5, while 23rd-seeded Spaniard Tommy Robredo bested Frances Adrian Mannarino 6-4, 6-1, 7-6 (7-5) and Czech Jiri Vesely upended 24th-seeded Frenchman Gael Monfils 7-6 (7-3), 6-3, 6-7 (1-7), 6-7 (3-7), 6-4. Also on Day 4, Kukushkin drubbed Canadian Frank Dancevic 6-3, 6-3, 6-2, Istomin defeated German Julian Reister, 7-6 (9-7), 6-4, 6-4, and Polands Lukasz Kubot overcame Serbian Dusan Lajovic 6-7 (4-7), 7-6 (7-4), 6-3, 7-6 (7-3). Kubot was a surprise Wimbledon quarterfinalist last year. Rain forced the suspension or postponement of three matches, as 15th-seeded 2013 semifinalist Jerzy Janowicz was leading former world No. 1 and former Wimbledon champ Lleyton Hewitt 7-5, 4-4, 19th-seeded Feliciano Lopez never took to the court against Croat Ante Pavic, and 30th-seeded Spaniard Marcel Granollers was ahead of Colombian Santiago Giraldo 6-4, 6-7 (2-7), 6-1, 1-6, 2-1 when play was called for the day. Lopez titled on grass in Eastbourne last week and was a runner-up on grass the week before at Londons Queens Club. The third round will commence Friday, including matches for top-seeded former champion Novak Djokovic and third-seeded reigning champ Andy Murray. Last years runner-up to Murray, Djokovic, will meet Frances Gilles Simon, while Murray will take on last weeks grass-court champion in The Netherlands, 27th- seeded Spaniard Roberto Bautista Agut. Also seeing third-round action will be sixth-seeded 2010 Wimbledon runner-up Tomas Berdych, 11th-seeded recent Queens Club champ Grigor Dimitrov and the former Aussie Open runner-up Tsonga. Swell Kopen .S. Basketball Writers Association. McDermott, who finished his career at Creighton as college basketballs fifth-leading scorer, accepted the honour from Hall of Famer Oscar Robertson at AT&T Stadium, site of the Final Four. Swell Drinkfles . Louis and Ryan Kesler have demanded to be traded. http://www.swellnederlandkopen.com/swell-waterfles.html . -- Craig Anderson has quite a record against his former team, the Florida Panthers.MOSCOW -- Russias counter-terrorism agency says its studying a video posted by an Islamic militant group that asserted responsibility for suicide bombings that killed 34 people last month and is threatening to strike the Winter Olympics in Sochi. Security experts say the Russians are right in taking the threat seriously. The video was posted online Sunday by a militant group in Dagestan, a predominantly Muslim republic in Russias volatile North Caucasus. The Olympic host city of Sochi lies only 500 kilometres (300 miles) west of Dagestan. Two Russian-speaking men featured in the video are identified as members of Ansar al-Sunna, the name of a Jihadist group operating in Iraq. It was unclear whether the men in the video had received funding or training from that group or only adopted its name. There was no confirmation the two men were the suicide bombers who struck the southern Russian city of Volgograd last month as the video claims. Scores of people were also injured by the bombings of a train station and a bus. Russias National Anti-Terrorism Committee said Monday it was studying the video and would have no immediate comment. The video couldnt be viewed in Russia, where Internet providers cut access to it under a law that bans the "dissemination of extremist materials." It was released by the Vilayat Dagestan, one of the units that make up the so-called Caucasus Emirate, an umbrella group for the rebels seeking to establish an independent Islamic state in the North Caucasus. Doku Umarov, a Chechen warlord who leads the Emirate, had ordered a halt to attacks on civilian targets in 2012. But he rescinded that order in July, urging his followers to strike the Sochi Olympics, which he denounced as "satanic dances on the bones of our ancestors." The games run from Feb. 7-23. The Kremlin-backed leader of Chechnya claimed last week that Umarov was dead, but the claim couldnt be verified. The Vilayat Dagestan statement said the Volgograd attacks were carried out in part because of Umarovs order, but it didnt specifically say he had ordered them. Dagestan has become the centre of an Islamic insurgency that has engulfed Russias North Caucasus after twoo separatist wars in Chechnya. Swell Waterfles . Militants seeking to create an independent state governed by Islamic Shariah law in the Caucasus launch daily attacks on police and other authorities there. One of the two ethnic Chechen brothers accused of staging the Boston Marathon bombings spent six months in Dagestan in 2012. Andrei Soldatov, an independent Moscow-based security analyst, said the video threat need to be taken seriously. "They have capabilities to strike beyond the North Caucasus, which they demonstrated in Volgograd," he said. "Its extremely difficult to stop a lone wolf suicide bombing attack." Georgy Mirsky, a respected Russian expert on the Middle East, said the video reflected the increasingly close ties between Jihadists in the Caucasus and elsewhere. Russias war against Caucasus militants has made it an enemy on par with the United States and Israel for militant Islamic groups in the Middle East, he wrote on his blog. Russia has responded to the Islamic threat by introducing some of the most sweeping security measures ever seen at an international sports event. Some 100,000 police, army and other security forces have been deployed, according to analysts, and tight restrictions have been placed on access to the Sochi area. Anyone attending the Winter Olympics has to buy a ticket online from the organizers and obtain a spectator pass that requires providing passport details. Authorities have already barred access to all cars registered outside of Sochi and Russian police have gone house-to-house methodically screening all city residents. Soldatov argued, however, that Russias massive security presence at the Olympics could also have an adverse effect. "When you put so many troops on the ground, you might get some problems with the co-ordination of all these people," he said. Soldatov noted that the ominous threat of a "present" for the visitors to the Games contained in the video is loosely phrased and could herald an attack outside tightly guarded Olympic facilities. "They never tried to specify the place where they might strike, thats why everybody should be concerned," he said. ' ' '