Manchester United boss David Moyes has come under attack from a familiar source, Dutch coach Raymond Verheijen.
The 42-year-old, who was briefly caretaker manager of Wales, hammered the under-fire United boss earlier this month for his 'prehistoric' training methods that he felt contributed to Robin van Persie's injury problems this season.
Verheijen took exception to the homogenous nature of Moyes's training, with van Persie expected to do just as much work as younger, fitter players.
And he's expanded upon his criticism of the United manager in an interview with Irish Radio show Newstalk: Off the Ball.
Verheijen said: "Any journalist who had done his homework could have made that prediction [that United would suffer injury troubles].
"You can only change if you know how to do it better; and if you don't know how to do it better, then you can't change.
"Tactically, I don't think he's the best coach in the world, to put it politely.
"If you are a coach who has won nothing, and has never even played a Champions League game, managing players who have won everything…that is a tricky combination."
Verheijen was the same fitness coach who labelled Moyes a 'dinosaur' over the summer after the United boss revealed his plan to 'overtrain' Van Persie.
The Dutch coach said such a training method would increase the chances of the United striker suffering a fatigue injury later on during the campaign.
He feels that prediction is now coming true.
Verheijen continued: "Coincidentally when United were in Sydney last July, I was there as well.
"I went to the training sessions and I could see what they were doing with Robin Van Persie. He had to do a lot of running work and sometimes he even had to do it twice a day.
"You have to keep in mind that he missed the first week of preseason so his fitness level was lower than the rest of the team. That already means you have to be careful.
"[Van Persie] had also just travelled for 30 hours and he had a nine-hour time difference. Normally the body takes a week to recover from that.
"And still, despite these difficulties, they immediately overtrained him because they want him to catch up on the rest of the team.
"Moyes literally said it in the media. You don't have to be Einstein to understand that is gambling."
Clearly not Moyes's biggest fan, then.