Peterborough defender Tommy Rowe will be out of action until October because of a fractured left collarbone.
The 23-year-old, last season's Player of the Year, was hurt during the second half of the Championship club's 6-0 friendly victory over St Neots.
"Scans have confirmed that Tommy fractured his clavicle," team physio Chris Burton told the club's website.
"Unfortunately, due to the type of fracture, he will be ruled out to October."
Rowe is currently manager Darren Ferguson's first-choice left-back after beginning his career as a midfielder.
He has made 124 appearances for the club
since joining them from Stockport County in May 2009.