's Benjamin Becker 7-6 -LRB- 7-4 -RRB- 6-3 . Fourth seed Rafael Nadal beat fellow Spaniard and 15th seed David Ferrer 7-6 -LRB- 7-5 -RRB- 6-4 and will next face eighth seed Jo-Wilfried Tsonga , who trounced Juan Carlos Ferrero of Spain 6-2 6-2 . Fifth seed Robin Soderling of Sweden progressed with a 6-0 6-7 -LRB- 3-7 -RRB- 6-2 victory over Chile 's Fernando Gonzalez , while Mardy Fish of the U.S. was forced to retire while trailing 6-1 1-0 against 13th seed Mikhail Youzhny . In the women 's tournament , Venus Williams advanced to the semi-finals with a 6-3 6-1 victory over Agnieszka Radwanska . She will face France 's former Wimbledon finalist Marion Bartoli , who beat Yanina Wickmayer 6-4 , 7-5 . Williams , who had required three sets to defeat Daniela Hantuchova in the previous round , was delighted to have had an easier ride this time around . `` Getting through a match like yesterday makes me more confident because it was n't exactly my best game , '' she told the tournament 's official Web site . `` Today I was kind of eager to clean up my act . We had
-LRB- CNN -RRB- -- Roger Federer suffered a surprise defeat to Czech Tomas Berdych in the fourth round of the Sony Ericsson Open in Miami . The Swiss top seed was a long way from his best as Berdych edged a tight battle 6-4 6-7 -LRB- 3-7 -RRB- 7-6 -LRB- 8-6 -RRB- . Federer had a match point in the deciding tie-break but missed his chance with a wayward forehand , allowing Berdych to claim the victory three points later . Federer , who won the latest of his record 16 Grand Slam singles titles at the Australian Open in January , had only lost once to Berdych in nine previous meetings . `` It 's no secret I 've struggled the last five matches I 've played here in the States , '' Federer told the official ATP Tour Web site . `` I 'm definitely lacking timing . I do n't know where that comes from because I played so nicely in Australia . So it 's disappointing to not be able to back it up . '' They were joined in the quarterfinals by American Andy Roddick , who fought back from 4-1 down to defeat Germany