Andre Villas-Boas has been sacked by Chelsea after less than a season in charge at Stamford Bridge, the Premier League club announced in a statement on their website on Sunday.

Former Chelsea midfielder Roberto Di Matteo, who had been working as Villas-Boas's assistant, has been appointed interim manager until the end of the season.

West Bromwich Albion piled the pressure on Chelsea with a 1-0 victory on Saturday as Premier League leaders Manchester City downed Bolton to open up a five-point lead at the top of the table.

An 82nd minute strike from Gareth McAuley secured all three points for West Brom at the Hawthorns to deal a fresh blow to under-fire Chelsea manager Andre Villas-Boas, reportedly battling to hang on to his job.

Roger Federer underlined his status as an enduring front line contender with the 72nd title of his career which extended his record of Dubai Open trophies to five with victory over Andy Murray on Saturday.

The 16-time former Grand Slam champion from Switzerland overcame the triple Grand Slam finalist from Britain 7-5, 6-4 in a tightly-contested final in which Federer escaped an early mini-crisis and then resisted a Murray mini-comeback.

Bayer Leverkusen warmed up for their Champions League clash at Barcelona with a 2-0 home win against Bayern Munich on Saturday, as the Bavarians' poor form continued.

The hosts took the lead on 79 minutes when ex-Germany striker Stefan Kiessling tapped the ball home from two yards after Swiss forward Eren Derdiyok's overhead kick took Bayern goalkeeper Manuel Neuer out of the game.

Olympic champion Viktoria Rebensburg of Germany won her second straight World Cup giant slalom on Saturday, while overall leader Lindsey Vonn had a blazing second run to finish second.

Rebensburg's consecutive wins in two days put her in a good position to retain her giant slalom title.

Devin Harris scored the winning points by converting a three-point play with 4.5 seconds left as the Utah Jazz beat Miami 99-98, snapping the Heat's nine-game win streak.

Brazil Sports Minister Aldo Rebelo said Saturday his country would no longer recognize FIFA secretary general Jerome Valcke as a spokesman after he slammed the country's faltering organization of the 2014 World Cup.

"The government will no longer accept the secretary general as FIFA spokesman," Rebelo told a press conference a day after Valcke went so far as to suggest the organizers needed a "kick up the backside."

Robin van Persie delivered a huge blow to Liverpool's Champions League prospects as Arsenal secured a dramatic 2-1 win at Anfield on Saturday.

Dirk Kuyt missed a penalty for Kenny Dalglish's side before Laurent Koscielny's own goal gave the hosts the lead.

Top-ranked Novak Djokovic lost for the first time this season, falling to Andy Murray 6-2, 7-5 in the semifinals of the Dubai Championships on Friday.

The surprisingly one-sided victory ended Djokovic's 10-match winning streak that included the Australian Open title and his bid for a fourth successive Dubai title.

FIFA has launched an investigation into the "unusual outcome" of Bahrain's 10-0 victory over a weakened Indonesia team in a World Cup qualifying match.

Bahrain's win on Wednesday has raised suspicion because it needed to make up a nine-goal deficit on Qatar in the group standings to have a chance of advancing to the next round.