McKernan: 'We weren't holding ourselves to the high standards that we were last year'

Poor discipline has been a mark against Tyrone during both the League and Championship

Tyrone’s Michael McKernan. Mandatory Credit ©INPHO/Evan Treacy

Tyrone defender Michael McKernan admits the All-Ireland champions have to improve their discipline if they're to hold onto the Sam Maguire Cup.

The struggling Red Hands face Armagh in Round 1 of the All-Ireland qualifiers on Sunday and if they lose their season will be over.