Paul Scholes slammed Manchester United duo Kobbie Mainoo and Alejandro Garnacho after spotting what they did in training.
On Wednesday, Man United went through their paces as they trained ahead of resuming their Premier League campaign on Saturday.
They travel to Bournemouth having played out a thrilling 2-2 draw against Liverpool last weekend.
Mainoo scored in his side's draw as fans spotted a spooky detail in his spectacular strike.
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The 18-year-old has been one of Erik ten Hag's best performers following his emergence. The 19-year-old Argentine has also starred in attack, scoring a goal of the season contender against Everton.
But Scholes took exception to what the pair of Man United academy graduates did during their training session.
A picture shows Mainoo and Garnacho wearing hats and gloves while having their hoods up, which didn't sit well with the Man United legend, who claimed the 'standards begin on the training pitch'.
On his Instagram story, the 49-year-old shared an image of the youngsters in training, accompanied with the caption: "Don't mind hats and gloves but no way can they train properly with your hood up...standards begin on the training pitch...bye."
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Scholes has made his feelings clear on the current regime at his old side as he believes Ineos have already made a decision on Ten Hag's future.
Speaking after Man United's crushing 3-1 defeat to Manchester City last month, he said: "What we're seeing is a million miles away from a team that should be challenging for the league. Every single season it's just so far away.
"I think they [Ineos] have already made their mind up. I don't think he will be there next season. No.
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"From the interviews we've heard with Sir Jim, I thought there was a little bit of negativity towards the club the last 10 or 11 years and especially the last two years. I don't think he's happy with what's going on.
"I wouldn't be surprised if they're looking for a new manager now. I'm not saying it's the right decision."
Man United dropped points at Brentford and lost to Chelsea in dramatic fashion since their defeat at the Etihad.
But they have beaten Liverpool in the FA Cup and took a point off them in the league.
Topics: Paul Scholes, Kobbie Mainoo, Alejandro Garnacho, Manchester United, Football