De Ligt has been a player in demand following his performances last season for both club and country, with both United and Barcelona looking to sign him up. The English club have seemingly offered a much higher salary to the youngster in order to secure his signature.
With Paris Saint-Germain also in the fray, Gullit believes that it would ultimately be the lack of Champions League football that would cost the team.
“I don't think it'll be Manchester United, they don't play in the Champions League,” Gullit told Omnisport, according to Goal. “I think he wants to play in the Champions League, so that's unfortunate for Manchester United. It's going to be difficult [for a lot of teams], a lot of them [big teams] might have UEFA [transfer] bans, so there's a lot that's going on still. So I hope he makes the right decision for himself.”
It remains to be seen where De Ligt will end up playing in the new season, with the Ajax captain even suggesting that might stay back at the Dutch club for one more season and is in no hurry to make a decision about his future.
But top clubs will not keep waiting as they prepare for a new season, with Barcelona especially incensed that the player is taking a long time to come to a decision.