Mikel Arteta has reportedly blown away Arsenal players and members of staff with his coaching methods after becoming the club's permanent boss last month.
Following the sacking of Unai Emery in November, the Gunners announced the arrival of Arteta on December 20, with the former midfielder leaving his role as Pep Guardiola's assistant at Manchester City.
Having drawn with Bournemouth and lost at home to Chelsea in his opening two games, the Spaniard claimed his first win as Gunners boss against Manchester United on Wednesday night.
According to The Mirror, players and staff alike have been left impressed by the methods with which Arteta has encouraged a high-pressing style.
Members of the Arsenal squad had to report to training at 8am on New Year's Day for a light session on the Emirates pitch ahead of facing Ole Gunnar Solskjaer's side.