Barcelona coach Josep Guardiola will remain with the Spanish champions until June 2012 after signing a one-year extension to his current contract on Wednesday.

The 40-year-old's current deal was due to expire at the end of the season but earlier this month the club announced he had agreed to stay for another year.

Novak Djokovic's first match since winning last month's Australian Open brought him a notable atonement and created the impression of a player significantly better than three years ago.

Djokovic's smartly taken 6-3, 6-3 win over Michael Llodra in the first round of the Dubai Open reversed the result of their encounter in the Paris Masters three months ago.

Real Madrid coach Jose Mourinho admits his side have two major psychological barriers to overcome when they travel to Lyon on Tuesday for the first leg of their Champions League last 16 tie.

Nine-time winners Real have fallen at the last 16 stage in each of their last six seasons and Mourinho believes that is something his team have to get over along with the fact that Lyon eliminated Real 2-1 at this stage of the competition last season.

Caroline Wozniacki regained the world number one ranking from Kim Clijsters when she reached the semi-finals of the Dubai Open with a 6-2, 7-5 win over Shahar Peer on Friday.

The top-seeded Dane also avenged herself for her loss last year here to Peer, who was the first Israeli woman ever to compete in the UAE, reaching the semi-finals.

Svetlana Kuznetsova, who missed six match points while losing the longest match in Grand Slam history in Melbourne last month, missed six more whilst gaining revenge over Francesca Schiavone in the Dubai Open today.

The former French and U.S. Open champion from Russia beat the French Open champion from Italy 1-6, 6-0, 7-5 in another extraordinary match in which picking a winner was like trying to understand the motions of a seismometer.

Vera Zvonareva, the Russian who came within a couple of wins of becoming a surprise year-end world number one, continued her bid to reach the pinnacle with a fine start to the two-million-dollar Dubai Open.

Zvonareva overcame Roberta Vinci 6-3, 6-1, finishing the second round match with such panache that she reduced the capable top 40 Italian to an unexpectedly pedestrian second best.

Roma host Shakhtar Donetsk in the Champions League on Wednesday in a match that has taken on extra significance for the Italians.

Claudio Ranieri's team have taken just one point out of the last nine in Serie A, losing to two of their would be title rivals: Inter Milan and Napoli.

Brazil legend Ronaldo, whose goals helped his country win two World Cups, has hauled his aching limbs onto the pitch for the last time and will announce his retirement on Monday, Brazilian media said.

"I can't take any more," the 34-year-old star told the Estado de Sao Paulo newspaper ahead of a formal announcement expected at a press conference Monday.

Formula One star Robert Kubica has vowed to bounce back better than ever despite suffering a horror crash in a rally in Liguria on Sunday that has put his racing career at risk.

Surgeons battled for seven hours to save the functionality of his right hand and he is due to go under the knife again before also facing surgery on his arm and foot.

Dutch football legend Ruud Gullit landed in the Chechen capital on Wednesday to the cheers of hundreds of Terek Grozny supporters who hope to see him make their side the new darling of Europe.

The two-time world footballer of the year draped a green Chechen republic scarf around his neck and smiled broadly as fans chanted Gullit's name and performed traditional Caucasus dances around the global superstar.