Hartley also faces a fight for his place this year with summer signing Declan Gallagher lining up alongside Dunne in the first two games.

But Robinson hailed Hartley's exemplary attitude during his spell on the bench and the Englishman has vowed to continue fighting for his place ahead of Saturday's Ladbrokes Premiership opener at Livingston.

"It's a mentality," the former Plymouth and Hartlepool player said. "You can't expect to play. It doesn't matter whether you are captain of a football club or an 18-year-old lad, you just can't expect to play. You have got to earn the right through training.

"Whether I make the bench or I'm a starter, first and foremost it starts with your performances in training.

"I have just got to keep working the boys in front of me as hard as I can. Competition for places breeds success.

"I just do what I do, I am 31 years old now and I know my own body, I know what I need to do to get match fit. I have just tried to improve and get better every day really."