When the Swede first arrived at Old Trafford some expressed doubts over his ability to thrive in England's top flight after making a high profile, free transfer move from French champions Paris Saint-Germain.
But the 35-year-old has thrived in recent weeks and has now racked up 16 goals for Jose Mourinho's side already this season - 11 more, as it happens, than any other player at the club.
Now Raiola wants to make it very clear that his client has answered his critics and proved his doubters wrong.
"He’s a revelation for England. For the rest of the world, it is not a revelation," Raiola told Talksport.
It was one of our goals to show what he could do. It was always one of our goals to show what he could do in the Premier League. He killed everybody who had doubts.
Ibrahimovic arrived at Old Trafford on a one-year deal with the option for a second season and Raiola is confident that United will want to extend the Swede's stay.
"There is a big chance that there will be a second year, yes," he said.
We already included that in the contract so it's not new for us. It’s more a question of time, rather than when or if."
According to Raiola, Ibrahimovic turned down huge offers from China because he is so keen to clinch success in a fifth European league having picked up domestic silverware in the Netherlands, Italy, Spain and France.
"He choose not to take it [Chinese money] to come to England. The boy is not done yet. He still has the fire, he wants to win, to perform.
If it was only money, he would not be with Manchester United. His ultimate goal is to win the Premier League. It’s the only league he's played in that he’s yet to win.
Manchester United's Zlatan Ibrahimovic celebrates scoring their first goal with Jesse Lingard
Image credit: Reuters
Ibrahimovic has been in sensational form over the last few weeks and his ability to perform in the Premier League should not be in any doubt at this stage - indeed, nor should it have been at any stage.
He may be 35, but there can surely be no other outcome than United keeping the Swede for at least his second year at Old Trafford - as Mourinho has recently hinted.
United were badly lacking leaders in the dressing room and Ibrahimovic has brought that confidence and swagger for the rest of the players to follow. He really is a key component of Mourinho's side, despite his age.