Blackburn captain Ryan Nelsen has been ruled out for up to a month after he suffered a hamstring injury in the UEFA Cup defeat by Larissa.
The 29-year-old limped off just before the hour during the 2-0 first round first leg-defeat by the Greek Cup winners at the Panthessaliko Stadium in Volos.
Manager Mark Hughes told the club´s official website, www.rovers.co.uk: "It is the hamstring that he had the operation on but we think it is a bit of scar tissue that has released itself."
Copyright (c) PA Sport 2007, All Rights Reserved.