Ryan Giggs has sarcastically suggested Zlatan Ibrahimovic "knows more about Manchester United than us" in response to the LA Galaxy forward's claim the Class of 92 are "always complaining and criticising" the club.

Gary Neville and Paul Scholes, in particular, were vocal critics of the team during Jose Mourinho's reign as manager. Neville also criticised the United hierarchy prior to Ole Gunnar Solskjaer's arrival as caretaker manager, following Mourinho's sacking in December.

"Only Nicky [Butt] is connected with the club now, but when you play over 2000 games [3,450 in total] between us, we are going to have an opinion," Wales manager Giggs said at United's Carrington training ground ahead of the friendly against Trindad and Tobago.

"Sometimes it's positive, sometimes negative, but it doesn't have an effect on results. We are supporters. That's what football is about, having different opinions. But he [Ibrahimovic] obviously knows more about the club than us."

Giggs, meanwhile, has said he is worried about Manchester City eclipsing United's 1999 Treble success by winning the Quadruple this season.

City have already won the Carabao Cup and remain on course for success in the Premier League, FA Cup and Champions League.

"I've got enough to worry about, please don't bring that up!" Giggs, United's record appearance holder with 963, added. "They're a fantastic team, aren't they?

"They've already got one and United going out of the FA Cup makes that a little bit easier for them. They've got a long way to go, but just like us in the Treble, you need a lot of things to go for you, that bit of luck, which they had at the weekend.

"But they are a brilliant team. It will be interesting to see what they can achieve."