The 24-year-old has been in impressive form for Aston Villa during the 2019-20 campaign, scoring nine times and registering eight assists in 31 appearances in all competitions.
The Englishman is widely expected to leave Dean Smith's side this summer regardless of whether they stay in the Premier League, and Bent believes that the attacker will join one of three clubs.
"I think Jack Grealish has got his sights set on maybe three teams. I would say probably Manchester United, Manchester City, and potentially maybe Spurs," Bent told Football Insider.
"I think they're the three that are looking at him, and he's eyeing them thinking 'I'd like to go to one of them'. I'd probably put Man United at the very, very top of that. If that doesn't happen and Villa go down, you never know, but for me, he's got his eye on them."
Grealish, who has seven Premier League goals to his name this season, will see his current deal at Villa Park expire in the summer of 2023.