The former Liverpool star will no doubt have taken great pleasure in watching the Reds trash United at Old Trafford yesterday, as two Steven Gerrard penalties and a Luis Suarez strike gave Brendan Rodgers' side a comfortable 3-0 win over their biggest rivals.
But the Scot is supporting his compatriot by saying he has never wanted United boss David Moyes to be sacked, though he admitted that bad results in upcoming games against Olympiakos and rivals Manchester City could make his position questionable.
"I have never been a manager and would not condone getting rid of Moyes this season, but if United go out of the Champions League against Olympiakos on Wednesday night, and then lose against Manchester City, there will be serious doubts over whether Moyes can continue," Hansen wrote in The Telegraph.
There have been many accusations that the United players simply aren't playing for Moyes, but Hansen has played down that talk, suggesting that there is no problem with the effort or desire at Old Trafford - it's simply that the squad at Moyes' disposal simply isn't good enough to challenge.
"What he needs more than anything right now is for the players to pull him out of a big hole. I still think they are playing for him, they have not downed tools and there are none of the tell-tale signs you see when players are not performing for their manager. It is simply because they are not good enough."
A full squad overhaul is expected to take place this summer at United, but with question marks over Moyes' capabilities in the transfer market, is the former Everton manager really the man that the Glazer's should be putting their faith - and their millions - in?