"It's just the only thing that bothers you a bit is you need a squad," he told Setanta's Steve McManaman. "You end up playing a lot if you do get through the qualifying stages.
"Every Thursday night takes a bit of a toll on you unless you've got a strong squad of players.
"One or two, like Sol Campbell, Saturday-Thursday-Sunday is going to be stretching him to the limits. All the travelling and getting back, I'm sure Sol will be the first to admit he's going to find it quite difficult."