Ben Spies has announced that he will require surgery for the dislocated left shoulder suffered during practice for last weekend's Indianapolis MotoGP.
"Saw the doc today. not great. Off to surgery tomorrow!" Spies wrote on Twitter (@BenSpies11) this morning.
Indy had marked the luckless Texan's return to fitness after extensive right shoulder injuries in Malaysia last October, which had also required surgery.
The Pramac Ducati rider - who has not started a race since round two of this year due to the lengthy healing time and associated muscle problems - then damaged the left shoulder when he fell during an out-lap in Saturday practice at Indy.
The former AMA and WSBK champion was caught out by the traction control on his Desmosedici, which does not engage in first gear.
Spies will again be replaced by Ducati test rider Michele Pirro at Brno this weekend, and will surely also miss next weekend's British round at Silverstone. Spies is in the first year of a two-year contract with Ducati.
Rookie team-mate Andrea Iannone is still struggling with the shoulder dislocation he sustained in mid-July. Iannone did not undergo surgery.