Clemence lasted just eight minutes of the 1-0 home win at St Andrews's on Tuesday night before retiring with a hamstring injury whilst Butt, who had sustained a similar injury during last weekends game against Chelsea, aggravated his hamstring injury and was replaced just half-an-hour into the Bolton match. "We hope they aren't too bad but I fear the worst," Blues boss Steve Bruce said. "With hamstring injuries like they've got, I can't see them taking much part in the remainder of the season."