Everton hero Leon Osman says former teammate Ross Barkley needs to discover some consistency.

Barkley, 22, has played in all seven of Everton's league games this season, managing one goal and one assist.

"Koeman, the way he is around the club, he won't stand for inconsistency and will make him a better player," Osman told BBC Radio 5 live.

Koeman, who succeeded Roberto Martinez at Goodison Park in the summer, told Barkley to "look at yourself" following his most recent international omission.

"I think he's found the transition of new managers tough," added Osman, 35.

"It can be quite difficult if you play one way under a manager for three or four years and then a new one comes in with new ideas."