MotoGP title contender Jorge Lorenzo is reported to have suffered a minor shoulder injury while training on Saturday.

According to Motocuatro.com the Spaniard, who has cut Yamaha team-mate Valentino Rossi's championship advantage to just 14 points with four rounds to go, fell while training on a minibike.

Pain in his left shoulder - where he suffered a double collarbone break in 2013 - prompted medical checks in Barcelona, which fortunately ruled out any fractures.

However Lorenzo was diagnosed with 'sprained ligaments'. The injury is 'not serious', although the #99 is reported to have had his arm in a sling for the long flight to Japan ahead of next Sunday's MotoGP, the first of three races in three weekends.

Lorenzo's training spill comes a few days after reigning champion Marc Marquez required surgery to treat a fracture to the fifth metacarpal of his left hand, sustained in a mountain bike accident.

Rossi meanwhile fell at the post-race Michelin test at Aragon, causing some arm pain.

UPDATE: Lorenzo has sent the following tweet: