The Red Devils are suspected to be letting their interest be known in order to go all-out for Neymar next year, once Barca's transfer embargo is lifted.
In an exclusive for Yahoo Sport, he wrote: "This Neymar to United story and in the future, to City, PSG, and Chelsea will run and run.
GETTY
Guillem Balague anticipates a lot of names will be in for Neymar
"Not least because for those clubs with money, by which I mean REAL money - Real Madrid, PSG, Chelsea, Manchester City and Manchester United, if there was the slightest chance of signing Neymar, bearing in mind he is only 23-years-old, then they would snap it up in a heartbeat."
And Balague has accused Neymar's representatives of putting his name about and starting the rumours in order to get the best deal for their client at Barca.
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He added: "Not surprisingly Neymar’s people have already fired the first shots across the Barcelona bows helping offer to the media the ‘revelation’ that Manchester United are interested in the player.
"I’m fairly confident that at the end of the day Neymar will put pen to paper, but mark my words, until he does we’re going to have some fun. Eat your heart out, Hollywood."