Speaking in his Daily Mail column Ferdinand said : "Arjen Robben has been the outstanding player of the tournament for me so far, and not for the first time I've being thinking 'if only' about the missed opportunity Manchester United had to sign him when he was young.
"He should have been a United player. He would have fitted in.
"United made a bid of something around £5m and Sir Alex was always determined he wouldn't over-pay for any player.
"When that was rejected, Chelsea paid something like £12m."
For the big stories and the banter follow us on Twitter: @tribalfootball