United have taken a hard-line stance on all their eligible over-age players for the Olympics, with the exception of Giggs, who has indicated a willingness to be involved.
"It has come out as criticism. I don't understand that," said Ferguson of his Olympic stance. "The older players don't want to be involved. In the Olympics you play something a game every four days. Rio Ferdinand couldn't do that anyway.
"Ryan wants to play. I am happy with that. He is looking forward to it. Whether he plays three games in seven days is another matter - that is not my decision. But he does want to play because he has always missed out on the big tournaments with Wales."