The Swedish striker looks set to leave Paris Saint-Germain in the summer.
The Mail claims that the 34-year-old is set to leave Paris Saint-Germain at the end of the campaign when his contract expires, and has been strongly linked with finally coming to the Premier League after spending his entire career in several other of Europe's biggest leagues.
But van Gaal appears to have suggested that if he is still in charge next season, the maverick forward will not be coming to the club.
"We need to improve our selection [squad], because when I took over we had six or seven players above 33 years old," he told the Mail.
"But now we have a much younger team and still we need a much younger selection because we need creative players in attack and also fast players.
"I like [our] own youth players more because they already know the culture in Manchester United, and that is also the philosophy for example of Ajax or Barcelona and also Bayern Munich.
"He [Ibrahimovic] is already 34 and I just spoke about the age [of the players]."
Like Ibrahimovic, the Dutchman's chances of being at United next season look up in the air. The Mail reports that van Gaal has had no guarantees over whether he will be given the opportunity to see out the final year of his contract.
If he does remain as manager next season, he would arguably be wrong not to consider making a move for the former Barcelona and Juventus forward.
Although it may prove detrimental to the form of Anthony Martial and Marcus Rashford if Ibrahimovic was to join, they are both still some way off being the finished article, and the enigmatic Swede could actually help them perfect their game ready for when they take the mantle from him in the future.
While Ibrahimovic is in the twilight of his career, he has maintained a lethal strike-rate in front of goal, scoring 30 times in just 26 Ligue 1 games this term so undoubtedly has the ability to shine at the highest level, and can lead the Red Devils back towards greatness in a short space of time.
And considering that he would be available on a free transfer - although the Mail suggest that his representatives are seeking a contract worth £600,000 a week - it may be a smart move for van Gaal to change his stance.