Second seed Maria Sharapova raced into the Australian Open quarterfinals on Sunday as she beat unseeded Belgian Kirsten Flipkens in straight sets.

The world number two, a finalist at Melbourne Park last year, blitzed to a 6-1, 6-0 win and will next face fellow Russia's 19th seed Ekaterina Makarova, whom she beat in the last eight in 2012.

QPR manager Harry Redknapp admitted his side need to show more quality and composure if they are to win their battle to avoid relegation from the Premier League.

Redknapp's team remain bottom of the table after being forced to settle for a 1-1 draw in Saturday's London derby at his former club West Ham.

Atlanta Hawks guard Lou Williams will miss the rest of the NBA season after tearing a ligament in his right knee, the team said Saturday.

Williams was hurt in Atlanta's loss to the Brooklyn Nets on Friday. The Hawks said after the game he had sprained his knee, but further tests revealed a torn anterior cruciate ligament.

Liverpool manager Brendan Rodgers has praised the immediate impact of the partnership between Luis Suarez and Daniel Sturridge, who both scored in the 5-0 win over Norwich City.

Sturridge, 23, arrived from Chelsea in a £12 million deal ($19.6 million, 14.8 million euros) earlier this month and is just the seventh player in Liverpool history to score in each of his first three games for the club.

An injury-time strike from substitute Imanol Agirretxe condemned 10-man Barcelona to a 3-2 defeat at Real Sociedad on Saturday, their first of a record-breaking La Liga season.

Lionel Messi matched another landmark by scoring in a 10th consecutive La Liga game to put Barca ahead after six minutes with Pedro Rodriguez doubling the lead.

French teenager Paul Pogba scored a sensational brace to inspire depleted Juventus to a 4-0 rout of Udinese which helped the Serie A champions extend their lead over Lazio on Saturday.

Juve started their 21st match of the campaign with a three-point lead on both Napoli and Lazio but missing key midfielders Andrea Pirlo, Claudio Marchisio and Arturo Vidal due to recent injuries.

Shamed cyclist Lance Armstrong wants to return to competitive sport, but says the driving force behind his belated doping confession was the well-being of his five children.

"The biggest hope and intention was the well-being of my children," Armstrong told talk show host Oprah Winfrey in the second segment of their televised interview that aired on Friday.

Five-time Australian Open champion Serena Williams blasted the fastest serve of her career against Japan's Ayumi Morita Saturday as she gained valuable court time in her bid for a sixth title.

The American third seed had raced through her opening two matches at Melbourne Park for the loss of just two games but was made to work harder by Morita -- and she said the longer rallies were just what she needed.

In golf, as in other sports, money talks, but money cannot guarantee results.

Proof of that came in Abu Dhabi this week when the two biggest and best paid names in the game - Rory McIlroy and Tiger Woods - travelled to the Gulf to kick-start their seasons and both fell at the first hurdle.

Andy Murray Saturday backed a tougher anti-doping regime for tennis, including biological passports and more blood tests, to keep the sport drug-free after the Lance Armstrong scandal.

As Serena Williams called the Armstrong saga "sad" and women's number one Victoria Azarenka said the disgraced cyclist "deserves everything he gets", Murray said he would support tighter controls for tennis.