Federer cruises in Rotterdam opener

Switzerland's Roger Federer greets spectators at the end of the first round match in which he defeated France's Nicolas Mahut in two sets 6-4, 6-4, at the ABN AMRO tournament at the Ahoy Arena in Rotterdam, Netherlands, Wednesday, Feb. 15, 2012. (AP Photo/Peter Dejong)

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Federer cruises ... Switzerland's Roger Federer greets spectators at the end of the first round match in which he defeated France's Nicolas Mahut in two sets 6-4, 6-4, at the ABN AMRO tournament at the Ahoy Arena in Rotterdam, Netherlands, Wednesday, Feb. 15, 2012. (AP Photo/Peter Dejong)
Wozniacki upset ... Caroline Wozniacki of Denmark returns the ball to Lucie Safarova of Czech Republic during their women's singles match at Qatar tennis open tournament in Doha, Wednesday Feb. 15, 2012. (AP Photo/Osama Faisal)
Lisicki, Hantuch... Angelique Kerber of Germany returns the ball to Sabine Lisicki of Germany during their women's singles match at Qatar tennis open tournament in Doha, Tuesday Feb. 14, 2012. (AP Photo/Osama Faisal)
Clijsters injure... Kim Clijsters of Belgium looks up after losing a point to Victoria Azarenka of Belarus during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Thursday, Jan. 26, 2012. (AP Photo/Sarah Ivey)
Federer: No rift... Swiss Davis Cup tennis player Stanislas Wawrinka, left, and teammate Roger Federer, right, react after a winning point against US Davis Cup tennis players Mardy Fish and Mike Bryan during the Davis Cup World Group first round double match between Switzerland and the US in the Forum Arena in Fribourg, Switzerland, Saturday, Feb. 11, 2012. (AP Photo/Keystone, Laurent Gillieron)
Ivanovic wins in... Ana Ivanovic of Serbia returns the ball to Carla Suarez Navarro of Spain during their Qatar Open tennis tournament in Doha, Monday, Feb. 13, 2012. (AP Photo/Osama Faisal)
Azarenka thinkin... Victoria Azarenka of Belarus celebrates winning the first set of the women's final against Li Na of China at the Sydney International tennis tournament in Sydney, Australia, Friday, Jan. 13, 2012. Azarenka won the match 6-2, 1-6, 6-3. (AP Photo/Rob Griffith)
US completes Dav... From left, US tennis Davis Cup team captain Jim Courier poses with players Roy Harrison, Mike Bryan, John Isner and Mardy Fish after winning the Davis Cup World Group first round doubles match between Switzerland and the US in the Forum Arena in Fribourg, Switzerland, Saturday, Feb. 11, 2012. The US team will advance to the next round after a 3-0 lead. (AP Photo/Keystone, Laurent Gillieron)
Hantuchova repea... Daniela Hantuchova of Slovakia celebrates after winning the final match against Maria Kirilenko of Russia at the PTT Pattaya Open tennis tournament in Pattaya, Thailand Sunday, Feb. 12, 2012. Hantuchova won 6-7(4), 6-3, 6-3. (AP Photo/Sakchai Lalit)
Chilean star Gon... ADDS DATE OF RETIREMENT - FILE - This Sept. 16, 2011 file photo, shows Chile's Fernando Gonzalez returning the ball to Italy's Fabio Fognini during a Davis Cup tennis match in Santiago, Chile. Gonzalez, one 5th on the ATP's world ranking, announced Thursday he will retire next March 2012 at the masters tournament in Miami. (AP Photo/Aliosha Marquez, file)
Roddick on track... Andy Roddick of the US reaches for a forehand return to Australia's Lleyton Hewitt during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Thursday, Jan. 19, 2012. (AP Photo/John Donegan)
Williams sisters... Serena Williams of the US makes a backhand return to Russia's Ekaterina Makarova during their fourth round match at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 23, 2012. (AP Photo/Andrew Brownbill)
Wozniacki falls ... Denmark's Caroline Wozniacki answers questions at a press conference following her quarterfinal loss to Belgium's Kim Clijsters at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012. (AP Photo/Mark Baker)