Paul Merson, as known for his light-hearted nature as his flair with a football, has again censured Ishmel Demontagnac for his latest lapse in discipline and warned the teenager that his truculent disposition could damage his long-term prospects.
In fact, the Walsall manager yesterday openly questioned whether the talented winger will ever be able to harness the petulance that has thus far marred his fledging professional career.
The 17-year-old was sent off in last Saturday's 1-1 draw at Nottingham Forest, for raising his hands to Nicky Southall when Walsall were leading 1-0.
Merson had already taken his player to task once this week but he chose to do so once more yesterday, as his side prepare for tomorrow's visit from Hartlepool, leaving the London-born Demontagnac in no doubts as to what is expected from him as he builds a promising name for himself.
Asked if he was confident Demontagnac will get his act together, the former Aston Villa and England midfielder was unequivocal in his response. "I would not say I am confident - definitely not," he said.
And he knows it could cost him. "Temperament is the beall and end-all of football," Merson added. "If you keep getting booked or sent off, it's no good. It's not just the sending-off - it is the bookings with him, as well. He keeps getting bookings for cheap stuff."
Indeed. Demontagnac has only started nine League One games in his career and has already been booked in three and sent off in his latest appearance.
But last weekend's act of petulance was the worst yet and has landed him with a three-match ban and a fine of two weeks' wages and left his team one player short as they face six games in just over two weeks.
"I have had a word with him. He said he got caught up in the heat of the game, but it doesn't wash with me," Merson said.
"If I was the manager of another team, all I would do is just say: 'Go and wind Ishmel up and he will retaliate'. That's what he's done.
"They [Forest] were winding him up but I don't think he was having too much joy and that's why he got frustrated. Nicky Eaden played well against him and he just got frustrated. We were winning 1-0. He has just got to use his loaf."
On the positive side, Merson also highlighted occasions when Demontagnac has shown good restraint.
"He has been patient in certain games and we have to be fair to him that it might be the pressure of playing in first-team games at a young age," said the manager.
"When he first got in the team, I thought the lad at Huddersfield kicked him from pillar to post and Ishmel got booked and their lad didn't. He has got to learn."
The suspension has left Walsall without yet another first-team regular while Merson, himself, is the latest fitness worry.
The player-manager complained of a sore Achilles after training on Wednesday. As a result, he missed yesterday's session and will sit out today's in an effort to be fit in time for tomorrow's match.
With Jorge Leit?o also banned for one game, Walsall only have just one senior striker, Matty Fryatt. That could mean a call-up for the raw James Constable or teenager Alex Nicholls.
The latter, an 18-year-old local boy from Stourbridge, only made his first-team debut a fortnight ago but was impressive when finding the net in Tuesday night's FA Youth Cup loss to Charlton Athletic.
Merson will probably include Nicholls on the bench and, although he doesn't feel he is ready for regular senior football just yet, he predicted a bright future.
"He has got unbelievable pace, he was outstanding the other night - I thought he was one of the best players on the pitch - but the big thing is his finishing," said Merson.
"If he could finish, there is no question that he would go somewhere because he makes good runs and has what everyone wants - pace. One or two Premiership clubs are already looking at him.
"I like him. He has got great pace and if we can work on other things, he's definitely one that will be getting a contract at the end of the season."