The Sweden striker, who is leaving Paris St Germain this summer, has been strongly linked with United.
And at a press conference on Thursday, he confirmed he has had "concrete offers" from Premier League clubs.
He did not mention United specifically in that context, but spoke of his admiration for and "great relationship" with his former boss Jose Mourinho, who is expected to soon be named the club's new manager.
And when asked if there had been an offer from the Old Trafford outfit, Ibrahimovic paused for several seconds with a smile on his face, before saying: "Let's see what happens."
Asked if he has spoken to Mourinho in the past week, the 34-year-old frontman said: "I have spoken with him every day since I left Inter Milan (where they worked together in 2008-09).
"I have a great relationship with Mourinho and we are in contact, but not in the last weeks - we have been talking for many years."
Regarding the prospect of Mourinho taking over at United, Ibrahimovic said: "I think it is a great move - if you want action you bring Mourinho.
"I believe he is the man to take them back to the top.
"Wherever he went he has won
He knows what he is doing
If you want to win, you bring Mourinho.
"I had a fantastic time with him when I was working with him - so working again with him...?
"When I left Inter I said we had had a short time together but a great time
If we will work together again, I don't know
Let's see how things play out.
"I don't give guarantees - but there are concrete offers from the Premier League, so let's see what happens."
It was also put to Ibrahimovic that there have been questions over whether he would be suited to the Premier League, given his age.
He replied: "I am only warming up
I had a fantastic season and proved age is just a number.
"Everything is in your head - whatever you want to do, you will do it.
"If I want to make it, I will make it
I am not worried."
Source : PA
Source: PA