“I think it’s gone too far,” the former United midfielder said, speaking to journalists during the first part of the pre-match session at Carrington.
“I think it wasn’t long ago where you were kind of told you couldn’t really lay a hand on anybody in the box, and it was going to be stamped out and clamped down on.
“It’s crept in, it’s gone stronger. The success of set-pieces, at corners in particular, being able to put so many bodies close together, has made more teams do it because the success-rate is so high.
“It’s understandable why there are so many teams trying it and doing it, but, in terms of the game, it doesn’t feel like we’ve kind of got that balance right.
“I don’t know what there is to do about it – it’s not for me to decide that, really. But, in the meantime, you’ve got to deal with what’s in front of you and, if it’s allowed, you’ve got to play to it.”
