Berdych joins Federer with easy advance

Tomas Berdych followed the example of top seed Roger Federer by making almost effortless progress into the quarterfinals of the Rotterdam Open on Thursday as opponent Marcos Baghdatis quit while trailing 3-0 in their second-round match. Berdych spent just 19 minutes on court but put the former Australian Open finalist under immediate pressure with five break points. On Wednesday, Federer moved easily into the last eight at the Ahoy stadium as second-round opponent Mikhail Youzhny withdrew a day before their contest with a left foot injury. Federer still had to go out and win his opening match against Frenchman Nicolas Mahut, which he did, 6-4, 6-4. Federer and Berdych set the pace for No. 3 seed and Rotterdam debutant Juan Del Potro, with the Argentine 2009 US Open champion to face Slovak Karol Beck later in a bid for the quarters. Frenchman Richard Gasquet, seeded fifth, continued his steady progress at his second tournament appearance, defeating Russian Alex Bogomolov 6-3, 6-2. Italy's Andreas Seppi dispatched German Philipp Kohlschreiber 6-4, 6-2 in their second-round encounter. The 16th-ranked Gasquet improved his record to seven wins this season to next face Russian Niklay Davydenko. The Frenchman with six career titles went through to victory in just over an hour and a quarter with four aces and four breaks of the Bogomolov serve. "I'm happy to win in two sets and get into the quarters," said the winner who lost in his first Rotterdam appearance in the 2009 first round. "I didn't know how he plays, but I'm in good shape with my game and hoping to go further - why not win the next round. His quarterfinal with Davydenko is a repeat of the match he won this month in Montpellier, running his record over the veteran Russian to four wins in five encounters. Roddick rallies In San Jose, Andy Roddick shook off some early rust before ensuring experience triumphed over youth at the San Jose Open with a hard fought 6-7, 7-6, 6-4 victory over 19-year-old American compatriot Denis Kudla on Wednesday. Kudla, who reached the second round with a win over fellow teen Jack Sock a day earlier, is one of several young players showing off their potential at the event and he nearly scored a huge upset against the 29-year-old three-time champion. In a matchup of players heavily reliant on their serve, neither man was broken through the first two sets, which were both decided by tight tiebreakers. Roddick, who blasted 14 aces, fell 2-0 behind in the third set but responded by winning five of the next six games to finally see off the spirited challenge of his youthful opponent. After receiving a bye in the first round, the second seeded Roddick took to the court for the first time since a hamstring injury forced him to retire from the second round of last month's Australian Open. Roddick rolled his ankle and needed a lengthy medical timeout late in the second set but showed plenty of determination as he saved 12 of 13 break points during a match that lasted two hours and 42 minutes. "I stayed out there and did what I could, and I think he let it get away from him a little bit," Roddick said. "Probably the best thing I did was exist out there." Defending champion Milos Raonic had an easier passage to the quarterfinals, the big-serving Canadian staving off some stubborn late resistance from Tobias Kamke in a 6-2, 7-6 victory over the German. The third seed sent down 18 aces and prevailed 9-7 in a fluctuating second-set tiebreaker that took the contest past midnight. Earlier, American world No. 85 Sam Querrey continued his prolonged slump with a 5-7, 6-3, 7-5 defeat to Denis Istomin of Uzbekistan. Plagued by injuries since last season, the former world No. 17 has not won a singles title since August 2010 and lost for the fourth time in five contests this year. In other matches, 19-year-old American Ryan Harrison upset Belgian eighth seed Olivier Rochus 4-6, 6-2, 6-3, Matthew Ebden defeated Dudi Sela 6-7, 6-2, 7-6 and France's Julien Benneteau edged Ryan Sweeting 7-6, 7-6. World No. 13 Gael Monfils was the tournament top seed but the Frenchman withdrew from the event with a knee injury on Wednesday and will also miss next week's tour stop in Memphis. Radwanska in quarters In Doha, Poland's Agnieszka Radwanska advanced to the quarterfinals of the WTA Qatar Open on Thursday when she defeated Varvara Lepchenko of the United States. Radwanska, the world No. 6 and fourth seed in Qatar, fought back from a break down in the first set to clinch a 7-5, 6-1 victory over the Uzbek-born Lepchenko who is yet to win a WTA title after turning pro as a 15-year-old back in 2001. "I lost my serve in the first set and at that point the only thing I wanted was to fight back," said Radwanska, the winner of seven titles and a quarter-finalist at the Australian Open this year. "She was hitting the ball well, but I got my game together," added Radwanska who won three games in a row after trailing 4-5 in the first set. Earlier Belgian Yanina Wickmayer defeated Kazakhstan's Ksenia Pervak 6-4, 6-0 to make the last eight of the tournament, which has seen 11 of the 16 seeds crash out over the first three days.