Sir Alex Ferguson has explained that his preparations for next season are in "absolute chaos" because of call-ups to the London Olympics.
Team GB coach Stuart Pearce recently whittled his shortlist of players down to 80 and, although only 18 will ultimately make the final squad, Ferguson is unhappy that 10 of his players are being considered.
He said: "10 nominated, It's a joke. It's ridiculous, there are so many complications. You've got the European Championships and our pre-season tour.
"It is bloody serious. It's the start of the season. I haven't got a say in it but if the players don't want to go there is nothing they can do about it.
"Then one of the England youth teams, the U-19s, are in a competition and the FA have nominated five. We were intending to take them with us on our pre-season tour so it's utter chaos, absolute chaos."