Redknapp wrote in a column for the Daily Mail: “Prior to our FA Cup tie at Manchester United last weekend, we were in the hotel the night before the game when I bumped into Henrik and we had a chat.
“It became very obvious how he is enjoying this belated opportunity to show that he can score goals in the Premiership.
“There was surely no doubt, after 242 goals in 315 starts for Celtic. He also finished his spell at Barcelona with 13 goals in 20 Primera Liga matches. He is a goal machine.
“With injury doubts about Ole Solskjaer and Louis Saha, he is a clever signing for Alex. A fantastic footballer, a class act. The loan deal that tops the lot, in my view.”