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Premier League legend James Milner found out first-hand how easy it is to get on the wrong side of a manager.

The Champions League-winner was in his last season at Aston Villa when he took umbrage with Martin O'Neill's operation.

Specifically, it was his belief the squad wasn't doing enough to boost their fitness levels that didn't sit right with the former England midfielder, reported the Daily Star.

He wasn't alone, either, as Stephen Warnock detailed how he was astounded at certain aspects of O'Neill's blueprint after arriving at Villa Park in 2009.

However, it was Milner who got it in the neck from the manager for daring to voice his concerns over how little attention was being paid to fitness training.

"Gabby [Agbonlahor] went to Vegas twice and New York [once] in that year – in the season," said Warnock during a recent appearance on Undr the Cosh.

Warnock continued to describe how the 2009/10 season ended with Villa running out of steam around April, stating he and his teammates were "f****d, because we hadn't trained properly".

He also highlighted the stark contrast between the "ultra professional" environment at his previous club Blackburn and the fitness coach at Villa not even leading warm-ups because he "didn't wanna do it".

As it transpired, both Milner and O'Neill ended up leaving Villa Park in the summer of 2010!

Milner and Stephen Warnock only got to play one season as Villa team-mates.