They are two different players and, at times, it looks as if they're playing two different games.

There's the Serena Williams style, filled with intimidation and huge shots. And there's the way Caroline Wozniacki does it, with great hustle and even better conditioning.

Leandro Damiao's first half strike gave Brazil a 1-0 win over 10-man Ghana in a no-holds barred friendly here on Monday.

Damiao got the only goal with a clinical finish as the five-time world champions took advantage of extra space in the Ghana defense following Daniel Opare's dismissal.

Samantha Stosur lost the battle but won the war, surrendering an historic second-set tiebreaker but recovering to beat Maria Kirilenko 6-2, 6-7 (15/17), 6-3 Sunday to reach the U.S. Open quarter-finals.

Russia's Kirilenko prevailed in what the WTA said was the longest women's singles tiebreaker at a Grand Slam tournament to knot the fourth-round match at a set apiece.

Defending champion Rafael Nadal shocked the U.S. Open on Sunday when he collapsed with cramps during a bizarre news conference while Andy Murray stayed on course for a semi-final clash against the Spaniard.

Nadal, 25, was talking to journalists two hours after his third round win over close friend David Nalbandian, when he grimaced in pain, screwed up his eyes and slumped in the back of his chair, feeling his right leg.

European champions Barcelona will open a football school to polish young talent in Warsaw this week as Poland gears up to co-host Euro 2012 with Ukraine, a city official said on Monday.

"We've been working on the project for a year now. Barca feel that Poland is a good place to open this kind of school because of its infrastructure and the upcoming Euro 2012," Warsaw city sports advisor Wieslaw Wilczynski told Agence France Presse.

Barcelona midfielder Cesc Fabregas says he has a lot to learn and still feels he gets "in the way" a little when playing with his new team-mates.

Fabregas, who moved from Arsenal in a 29 million euro ($41m) deal last month, has had a dream start with Barca, scoring in their Super Cup victory over Porto in Monaco and their 5-0 win against Villarreal in the league.

Jurgen Klinsmann, still looking for his first victory as coach of the United States football squad, wants to see more nastiness from the Americans as they prepare to visit Belgium on Tuesday.

Italy's footballers are set to sign an agreement with club presidents on Monday that will end the current strike and allow the domestic season to start on September 9, a source close to the players' union (AIC) revealed on Saturday.

"The collective labor agreement between the players and Serie A will be signed on Monday morning or afternoon, there are just a few small technical matters left to be resolved," the anonymous source told Italian news agency Ansa.

Roger Federer reached the fourth round at a 30th consecutive a Grand Slam tournament by beating 27th-seeded Marin Cilic of Croatia 6-3, 4-6, 6-4, 6-2 on a blustery Saturday at the U.S. Open.

The third-seeded Federer improved his career record at Flushing Meadows to 59-6, including five championships.

If anyone still harbored any doubts about whether Serena Williams is back at her best, she put on a pretty persuasive performance during the first 17 minutes of her third-round match Saturday at the U.S. Open.

That's how long Williams needed to build a 5-0 lead en route to a 6-1, 7-6 (5) victory at Flushing Meadows over one of the best players the women's field had to offer: fourth-seeded Victoria Azarenka, a Wimbledon semifinalist two months ago.