Japan's Toyota Motor Co. said Friday it would operate all its domestic plants at half normal volume from May 10 to June 3, citing problems with parts supply following the quake and tsunami disaster.

"As (Toyota) continues to address its production situation in Japan following the disaster, it has decided that vehicle production from May 10 to June 3 will proceed at approximately 50 percent of normal," the company said.

Lewis Hamilton hinted Friday that he could leave McLaren in search of more success if the British team cannot provide him with a car capable of winning multiple world championships.

The 26-year-old Briton, who won the title for McLaren in his second season in 2008, said in Shanghai that his loyalty to McLaren had "limits" and that he was keen to maximize his time in the sport.

McLaren and Ferrari may look to Mark Webber to help clip his teammate Sebastian Vettel's wings in this weekend's Chinese Grand Prix -- and end his runaway start to the 2011 world title race.

Both McLaren drivers Jenson Button and Lewis Hamilton found the pace to mount a challenge to the defending world champion in last Sunday's Malaysian Grand Prix.

Jose Mourinho lit the fuse on Real Madrid's explosive Champions League semi-final showdown with Barcelona by claiming his club don't get the same treatment from UEFA as their Catalan rivals.

Mourinho will be without Ricardo Carvalho for the first leg against Barca after the Portugal defender triggered a suspension when he was booked for a foul on Tom Huddlestone in Wednesday's 1-0 win over Tottenham in the quarter-final second leg.

Real Madrid have made contact with Borussia Dortmund's Turkish play-maker Nuri Sahin over a move to the Spanish giants, according to a report in Wednesday's edition of the German daily, Bild.

Bild claim that Sahin, voted the best player in the first half of the current German season, has received an offer from Real, where Sahin's friend Mesut Ozil is already on the books.

AC Milan owner Silvio Berlusconi said he would not rule out trying to lure Real Madrid's Cristiano Ronaldo to the San Siro in the next transfer window -- if his club win the league title.

"Ronaldo at Milan? Dreaming isn't forbidden, and sometimes dreams come true," Berlusconi, who is also the embattled prime minister of the country, told Italian channel Italia 7 Gold.

Brazilian Rafael could be Manchester United's only doubt for the Champions League quarter-final, second leg clash at Old Trafford on Tuesday.

The 20-year-old suffered a knee injury in last week's first leg at Stamford Bridge, won 1-0 by United, ruling him out of Saturday's Premier League win over Fulham.

Red Bull's Mark Webber went quickest in both Malaysian Grand Prix practice sessions on Friday in a dominant display which raised hopes he can erase a disappointing start to the season.

Webber, fifth two weeks ago in Melbourne, bested McLaren's Jenson Button and Lewis Hamilton, while his team-mate and 2010 champion Sebastien Vettel focused on testing Red Bull's misfiring Kinetic Energy Regeneration System (KERS).

Two-time world champion Fernando Alonso said he is expecting more from his Ferrari team at the Malaysian Formula One Grand Prix after a disappointing season opener.

In spite of some strong results during winter testing, the Spaniard was unable to match the pace of reigning title-holder Sebastian Vettel of Red Bull and McLaren's Lewis Hamilton in Melbourne two weeks ago.

Red Bull chief Christian Horner has warned his team not to expect an easy run in this weekend's Malaysian Grand Prix and to be ready for a backlash from big rivals Ferrari and McLaren.

Red Bull's world champion driver German Sebastian Vettel won the season-opening Australian Grand Prix convincingly two weeks ago, leaving the chasing pack in his wake.