France's 'retired' rally maestro Sebastien Loeb dips back into the world rally championship this weekend, the nine-time world champion aiming to maintain his iron-like grip on the Rally of Argentina. The Citroen DS3 driver has won every edition of this South American leg of the championship since 2005, and his presence in the line-up adds spice to a field headed by compatriot Sebastien Ogier. Ogier heads the 2013 driver standings after shrugging off a debilitating virus to notch up his third win of the season in the Rally of Portugal last time out.

(Reuters) - The rear wing problem that wrecked Fernando Alonso's hopes of winning in Bahrain last weekend was due to a rare component failure within the DRS system, Ferrari said after an investigation. "It's the first problem of its kind on this system seen on the three years during which it has been used," the Italian team said on their website. "The failure is not something that causes concern for the long term."

By Alan Baldwin LONDON (Reuters) - Jenson Button could be thankful at least that McLaren allowed their drivers to race each other in Sunday's Bahrain Grand Prix, even as he accused team mate Sergio Perez of dangerous and 'dirty' driving. The 2009 world champion looked for positives after he and his Mexican team mate cleared the air at a hastily-arranged meeting with McLaren management after Sunday's race.

Pirelli is expected to hold talks at its Milan factory on Tuesday to decide what, if any, changes are needed to improve the performance of their controversial Formula One racing tyres. After four races dominated and decided by tyre-wear and the strategy required to cope with this season's fast-wearing rubber, F1's leading teams are keen to see Pirelli switch to producing more conservative tyres that help ensure truer racing for the drivers.