Arsenal fullback Kieran Tierney upset senior teammates when first arriving from Celtic, it has been revealed.

ESPN says several stars asked Tierney to tone down his aggression and tough tackling in training and save it for games with fears he could put some team-mates at risk of injury.

The left-back made the move to north London from Celtic last summer for a £25million fee.

But it is claimed that the arrival of Mikel Arteta has increased intensity in training again and Tierney's attitude has been viewed favourably by the new manager.

After an injury-plagued season, he has impressed since the Premier League restart and become a key figure for Mikel Arteta 's side.