This comes after the England international slammed the Red Devils for failing to keep their promise to make him the club's number one in an interview on Tuesday.
Henderson claimed that Manchester United promised to make him their number one goalkeeper, ahead of Spain international David De Gea, who is far superior and more experienced.
Henderson has left Old Trafford on loan to Nottingham Forest in order to make the England national team squad for the 2022 World Cup in Qatar.
"It appears pretty shocking," O'Hara told a source. He obviously has a backup plan, he's expecting to be involved.
"Let's be honest: David de Gea was fantastic for Manchester United last season." He is the number one goalkeeper in the world.
"Dean Henderson must accept that he will be a bit part player when David de Gea is available."
"I don't think he'll ever play for Manchester United again." That's it for now. When you conduct an interview like that and come out and criticize your parent club, it never sits well with the fans or the coaching staff.
"The new manager will look at it and say, 'It's time to move on.'" Perhaps he conducted that interview because, in the long run, he will want to move on.
"By the way, he's a fantastic keeper." He's probably too talented to be on the bench, but it is Manchester United.
"You don't come out and bash Manchester United if you're a member of the club." To be honest, Dean Henderson's only option at United is to leave.
"Sometimes, players say things in anger in the heat of the moment, We've all done it and lived to regret it."