Just when MotoGP looked set to field a 'full' 17-rider grid for the first time since round four at Le Mans, it has been announced that Loris Capirossi will miss Saturday's seventh round at Assen.

The Italian veteran's difficult start to the season got worse when he fell in the closing stages of Friday's Dutch TT qualifying session and was hit by his Pramac Ducati.

Subsequent medical examinations - first in the mobile clinic, then in the hospital in Assen -excluded serious injuries, but a dislocated right shoulder and injured rib cartilage will force Capirossi to miss the race.

"There's not much to say. It's not much fun to be crushed by a bike at high speed," said Loris. "I'm feeling better now, although I'm sorry to miss tomorrow's race. I crashed as I was at my best; I could have dropped my time, but the problem in left-hand corners, which we had already experienced in the morning's free-practice session, caused me to lose control. Tomorrow I'll go back to Monte Carlo, and in two days I'll undergo some more checks on my physical condition."

Capirossi joins Alvaro Bautista, Dani Pedrosa, Colin Edwards and Cal Crutchlow in missing at least one race so far this year.

Pedrosa is still absent due to a broken collarbone, but has been replaced this weekend by Hiroshi Aoyama - with HRC test rider Kousuke Akiyoshi filling in for the Japanese at Gresini.

Capirossi's home Italian MotoGP takes place at Mugello next weekend.