BUENOS AIRES, Argentina (AP) -- Top-seeded Rafael Nadal beat local qualifier Facundo Arguello 6-4, 6-0 on Wednesday to reach the quarterfinals of the Argentina Open.

Agnieszka Radwanska of Poland returns a ball to Maria Sharapova of Russia during the Fed Cup World Group first round tennis match between Poland and Russia in Krakow, Poland, Sunday, Feb. 8, 2015 . ( AP Photo/Czarek Sokolowski)

Fourth-seeded Agnieszka Radwanska brushed aside Flavia Pennetta 6-1, 6-1 on Wednesday to set up a quarterfinal with Venus Williams in the Qatar Open. ''For sure I wouldn't tell it was going to be that quick,'' Radwanska said. I think playing Venus is always a really good challenge.'' Top-seeded Petra Kvitova of the Czech Republic will take on third-seeded Caroline Wozniacki for a place in the semifinals after both their matches were cut short.


Roger Federer of Switzerland returns the ball to Fernando Verdasco of Italy during the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Wednesday, Feb. 25, 2015. (AP Photo/Kamran Jebreili)

DUBAI, United Arab Emirates (AP) -- Defending champion Roger Federer stormed back from 4-1 down in the first set to beat Fernando Verdasco 6-4, 6-3 on Wednesday and claim a spot in the quarterfinals of the Dubai Championships.


BUENOS AIRES, Argentina (AP) -- - Sixth-seeded Jiri Vesely of the Czech Republic was knocked out in the first round of the Argentina Open on Tuesday, beaten by Blaz Rola of Slovenia 6-4, 6-3.

Andrea Petkovic of Germany celebrates a point won against Madison Brengle of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2015. (AP Photo/Andy Brownbill)

Sixth-seeded Andrea Petkovic advanced to the second round of the Qatar Open with a 6-7 (5), 6-3, 6-2 win over Belgian qualifier Kirsten Flipkens on Tuesday. Flipkens, who beat Petkovic in the second round at New Haven last August, showed a good touch in the first set - only to crumble in the second as Petkovic opened up a 4-0 lead. The 10th-ranked Petkovic was in total control of the third set, with the German winning four games in a row to seal the contest. I always struggle against her,'' Petkovic said.


Novak Djokovic of Serbia celebrates after defeating Andy Murray of Britain in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Feb. 1, 2015. (AP Photo/Vincent Thian)

Playing for the first time since winning the Australian Open, Novak Djokovic came through with a 6-4, 6-4 win over Vasek Pospisil on Tuesday in the first round of the Dubai Tennis Championships. The top-ranked Djokovic won his fifth title in Melbourne at the beginning of the month. ''It's my first match since the Australian Open final so I'm still looking for that rhythm on the court,'' Djokovic said. ''I managed to stay mentally tough, patient and as soon as I got into the rallies I had a better chance of winning.'' Also, third-seeded Andy Murray was given a workout by Gilles Muller of Luxembourg before securing a 6-4, 7-5 win, and fourth-seeded Tomas Berdych, a finalist at Dubai the last two years, beat Jeremy Chardy of France 7-6 (2), 6-4.


France's Gilles Simon applauds after defeating France's Gael Monfils during their final match at the Open 13 tennis tournament, in Marseille, southern France, Sunday, Feb. 22 , 2015. (AP Photo/Claude Paris)

France captain Arnaud Clement surprisingly included Gael Monfils on Tuesday in his team to face Germany in the first round of the Davis Cup next week. Monfils complained of tiredness last week and withdrew from the World Group tie on the advice of coach Jan de Witt, but was picked on Tuesday alongside Gilles Simon, Richard Gasquet and Davis Cup debutant Nicolas Mahut. De Witt wanted Monfils to take a short break from competitive matches to find time for extra training after the pair started working together earlier this year.


Roger Federer of Switzerland returns the ball to Mikhail Youzhny of Russia during the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Monday, Feb. 23, 2015. (AP Photo/Kamran Jebreili)

BERN, Switzerland (AP) -- Without Roger Federer and Stan Wawrinka, Switzerland begins its Davis Cup defense in Belgium with no player ranked in the top 250.


Donald Young reacts after losing a point to Ivo Karlovic, of Croatia, during the final tennis match at the Delray Beach Open, in Delray Beach, Fla., Sunday, Feb. 22, 2015. Karlovic won 6-3, 6-3. (AP Photo/Alan Diaz)

Andy Murray will return to his native Scotland next week to lead Britain against the United States in the first round of the Davis Cup. Murray and his brother, Jamie, will face the Americans on March 6-8 on an indoor hard court at the Emirates Arena in Glasgow. James Ward and Dominic Inglot rounded out the team named by captain Leon Smith on Tuesday. U.S. captain Jim Courier named a team that featured John Isner and Donald Young in singles and brothers Bob and Mike Bryan in the doubles.


BUENOS AIRES, Argentina (AP) -- No. 5-seeded Leonardo Mayer of Argentina reached the second round of the Argentina Open on Monday, defeating Stephane Robert of France 6-0, 6-1.

Venus Williams of the U. S. returns the ball to Belinda Bencic of Switzerland during the second day of Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Monday, Feb. 16, 2015. (AP Photo/Kamran Jebreili)

Two-time champion Victoria Azarenka beat Angelique Kerber 6-0, 6-3 in the first round of the Qatar Total Open on Monday. Returning to Doha as a wild card entrant, Azarenka needed just 66 minutes to beat the eighth-seeded Kerber. Kerber, who lost to Simona Halep in last year's final, was blown away in the first set in which Azarenka dropped just nine points.


Roger Federer of Switzerland returns the ball to Mikhail Youzhny of Russia during the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Monday, Feb. 23, 2015. (AP Photo/Kamran Jebreili)

Roger Federer is skipping the Davis Cup this year after leading Switzerland to its first title in 2014. Federer played the entire Davis Cup season last year, with Switzerland beating France 3-1 in the final. The Davis Cup was the only major competition the 17-time Grand Slam champion had not won. Federer won't be in the lineup when Switzerland opens defense of the title in Belgium on March 6-8.


Roger Federer of Switzerland returns the ball to Mikhail Youzhny of Russia during the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Monday, Feb. 23, 2015. (AP Photo/Kamran Jebreili)

Defending champion Roger Federer had little trouble bypassing Mikhail Youzhny 6-3, 6-1 in the first round at the Dubai Tennis Championships on Monday. Federer was playing his first match since his third round exit to Andreas Seppi at the Australian Open last month. ''Best of three in a quick court sometimes you just can run away with the score, so that's where maybe a bad five to ten minutes can cost you the match,'' Federer said. I think we were both trying to find our range.'' The 33-year-old Federer, needed just 56 minutes to get through to the second round, and remains undefeated in 16 matches against Youzhny.