Novak Djokovic and Andy Murray hit top gear on Thursday as Petra Kvitova was the only top seed to encounter difficulties at the Australian Open.

Men's favorite Djokovic, Murray and 13-time grand slam winner Serena Williams highlighted the yawning gap between tennis's best and the rest as they strolled into the third round unhindered at Melbourne Park.

Five-time champion Serena Williams brushed off fears about her injured ankle Thursday as she sailed into the Australian Open's third round with her 500th career win.

The American 12th seed, who pulled out of this month's Brisbane International after rolling her ankle on court, fell awkwardly in the final game of her 6-0, 6-4 win against Czech opponent Barbora Zahlavova Strycova.

Former world number one Maria Sharapova dismissed concerns over a series of mismatches at the Australian Open Thursday despite dropping just two games in her first two matches.

The 2008 champion blasted her way into the third round with a 6-0, 6-1 demolition of U.S. qualifier Jamie Hampton, in one of a number of crushing victories from the top women's players at this year's Open.

The director of Interpol says there is no specific intelligence the Olympics will be targeted.

Ron Noble, secretary-general of the international police agency based in France, also said Thursday that Britain does a good job of screening identification documents against the Interpol database as part of its security procedures.

Real Madrid and Barcelona resume their historic rivalry on Wednesday when the two teams meet in the first leg of the quarter finals of the Spanish Cup.

The scene is the Santiago Bernabeu before the return leg in Barcelona the following Wednesday and at stake is the first of three prizes the two giants are targeting this season.

LeBron James had 33 points and 10 assists and Chris Bosh scored 30 points as the Miami Heat rallied from a 17-point first half deficit to beat the San Antonio Spurs 120-98.

Mike Miller had 14 points off the bench for the Heat who had a dismal first half and trailed 63-49 at halftime.

Rafael Nadal cranked up his bid for a second Australian Open title with a solid workout against Tommy Haas as great rival Roger Federer had a walkover into the third round on Wednesday.

World number two Nadal overcame four-time grand slam semi-finalist Haas 6-4, 6-3, 6-4 in 2hr 29min on Rod Laver Arena, while Federer put his feet up after his second-round opponent Andreas Beck pulled out injured.

Defending champion Kim Clijsters and No. 1-ranked Caroline Wozniacki advanced to the third round of the Australian Open in contrasting styles on Wednesday.

Clijsters needed only 47 minutes to beat Stephanie Foretz Gacon of France 6-0, 6-1, then showed just how much support she has at Rod Laver Arena by getting the crowd to sing 'Happy Birthday' to her younger sister.

Nearly eighteen years after the death of three-time world champion Ayrton Senna in a high-speed crash, the Senna name is returning to Williams Formula One team.

Senna's 28-year-old nephew, Bruno, signed a one-year deal to partner Venezuelan driver Pastor Maldonado and give the British team an all-South American lineup going into the March 18 opener in Australia.

Jose Mourinho defended Cristiano Ronaldo's form on the eve of Real Madrid's Copa del Rey quarterfinal against Barcelona, describing his performance against Mallorca as his best since the coach's arrival at the club.

Ronaldo has come under criticism after squandering chances in a 3-1 loss to Barcelona last month, but Mourinho said the forward's work ethic in the second half of Saturday's 2-1 win was better than all of his Madrid accomplishments before.