Motivation, not money, was the main reason Lewis Hamilton on Friday confirmed he was to leave McLaren for Mercedes next year.

That became clear in the aftermath of the news that he has signed for fellow-Briton Ross Brawn's Brackley-based team and was turning his back on the outfit that had nurtured his career since he was 13 years old.

Lewis Hamilton is moving to Mercedes, replacing seven-time Formula One champion replacing Michael Schumacher in a major shakeup that also sees Sergio Perez going to McLaren.

Hamilton has been at McLaren throughout his F1 career but the British team had been unwilling to match a lucrative offer from Mercedes, where he will team up with Nico Rosberg next season on a three-year contract.

Kaka is back in the Brazilian national squad for the first time since the 2010 World Cup.

The playmaker was selected Thursday despite being used sparingly by Real Madrid recently. Coach Mano Menezes picked Kaka in a squad for friendlies last year, but the player didn't join the team because of an injury.

With his camera-ready good looks, quirky catchphrases and funky fashion choices, swimmer Ryan Lochte parlayed the five medals he won at the 2012 Olympic Games into a burgeoning media career.

But the 28-year-old athlete says he's back in the pool training for future competitions and only embraced Hollywood to raise his sport's profile.

Kenya's national track federation is investigating claims of doping among its famed distance athletes and said Thursday it had asked the World Anti-Doping Agency and police for help.

Athletics Kenya chairman Isaiah Kiplagat told The Associated Press that his organization was looking into allegations by a German reporter and Kenyan athlete that performance-enhancing substances were being made available to runners by people posing as doctors.

FIFA has selected kick-off times for 2014 World Cup group games, with several matches scheduled in early afternoon in tropical climates.

FIFA announced the north-east coastal cities of Natal, Recife and Salvador each have two of their four group-stage matches starting at 1 p.m. local time (1600 GMT).

Chelsea captain John Terry was given a four-match ban by the Football Association (FA) after being found guilty of racially abusing Queens Park Rangers' Anton Ferdinand on Thursday.

An FA statement said an independent regulatory commission had issued a suspension for a period of four matches and a fine of £220,000 pending appeal.

Eight-time world rally champion Sebastien Loeb will miss most of the 2013 season, his Citroen team said Thursday, opening the door to the Frenchman's future participation in the World Touring Car Championship.

The 38-year-old Loeb, who is leading this season's drivers' standings in his bid for a ninth title, will only compete in "three or four" races, including the opening Monte Carlo Rally, according to co-pilot Daniel Elena.

Stephan El Shaarawy scored twice to help crisis-ridden AC Milan to a much-needed 2-0 win against 10-man Cagliari in Serie A on Wednesday.

El Shaarawy, who also scored in the loss at Udinese on Sunday, netted in each half and also had an effort deflected onto the crossbar as Milan ended the jinx of the new San Siro pitch. It is the team's first goals at home in any competition this season and the first time either of the Milan teams has won there.

Wayne Rooney returned from a month-long injury absence as Manchester United eliminated Newcastle to set up a League Cup clash with Chelsea, while Liverpool relied on Nuri Sahin's first goals for the defending champions to advance on Wednesday.

Anderson and Tom Cleverley scored to give United a 2-1 victory as Rooney played for the first time since gashing his right thigh, completing 76 minutes at Old Trafford.