Ferguson told BBC Sport: "There were six substitutions, the trainer came on, so that's four minutes right away and the goalkeeper must have wasted about two or three minutes and they took their time at every goal kick.
"That's obvious to everyone today and it's a flaw in the game that the referee is responsible for time keeping. It's ridiculous that it's 2012 and the referee still has control of that.
In short he wanted 7minutes