The Red Devils came out on top against Bournemouth on Saturday after a lacklustre first-half performance, with Anthony Martial and Marcus Rashford scoring to secure the come-from-behind victory.
But Petit was livid with the lack of commitment shown by Uniteds players in the first half and believes the likes of Matic, as well as Chris Smalling and Ashley Young, are not delivering for Jose Mourinho.
Asked if Uniteds players are letting their manager down, Petit told RMC Sport: I dont know but I know that Mourinho is doing his best.
Thats not enough, but I think that a lot of players in his team should really look in the mirror.
Matic first, is it his brother that signed for United from Chelsea? Except for the last season where he did good he is light years from what he is capable of.
Hes not the only one, theres Ashley Young and thats without even talking about the central defence. What are they doing at Manchester United?
Im tired of Smalling. You know me, Im not someone who hammers players so easily. But for him, Ive been asking myself for years. These players are not good enough to play in a club as big as Manchester United and that has been going on for years.
The game against Bournemouth after 30 minutes I was ashamed for the United players. I was ashamed for this mythical club, I was ashamed for its history, I was ashamed for Mourinho, I was ashamed for his staff, I thought to myself, but what is this a team of good for nothings.
Guys who dont give it their all who watch each other play. No inspiration. Honestly, it was shameful when you represent a club like that. It was shameful, Ive never seen United so bad for thirty minutes, under Mourinhos command.
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