Kieran Tierney has been told to ease up on his aggression in training according to former Arsenal man Martin Keown.
The full-back was signed in the summer from Celtic and has quickly made an impression despite having to deal with a host of injuries.
But his intensity in training has seen some of his team-mates call on him to "slow down".
Keown though has backed the Scottish star and referred to the way the 'Invincibles' used to train as a benchmark.
"I'm hearing that Tierney has been told to slow down in training because some of the players were frightened with how aggressive he was," he told TalkSport.
"No - that's exactly what you want in the camp and I'm pretty certain if you look at the league champions this weekend, Liverpool, I bet than in their training sessions the manager has had to pull them back a bit because they're so competitive. That's what you need.
"He was told 'you need to slow down young man, you're too aggressive' but I think that actually he doesn't, it needs to be harnessed, of course, as you don't want a player to go too mad in training but what you want is everybody following that same way of behaviour.
"I can tell you now, when we trained back in the day in 2004, the training was just as difficult as the games because they were so competitive and you didn't want to be the weak link, you've gotta have that edge and you've got to have winners.
"When it's competitive from within, you'll go on to be successful and that to me looks like what he [Mikel Arteta] is building again.
"It blew up in their face a bit against Brighton with Matteo Guendouzi, when comments were made.
"I think it was very obvious, publicly obvious, that some of the players had their priorities wrong but Arteta is addressing that now. It's only the beginning and it's game by game."
