Tomas Kalas has appeared to have undergone surgery on an ongoing groin issue that is likely to rule him out for the rest of the season.
The centre-back hasn't featured for Bristol City since the 2-1 home defeat against Birmingham on March 5, having been forced to sit out of the past five matches.
Nigel Pearson initially suggested he was a doubt with a groin problem before the victory over Blackburn on March 12. He later admitted that Kalas has reached his saturation point, laying blame to the amount of football he has played over the past two to three years.
