Monaghan are sweating on the fitness of Darren Hughes after he suffered an ankle injury playing for his club Scotstown on Sunday.
The county board confirmed that Hughes is set to undergo a scan to assess the damage.
The 2015 Ulster champions will play Cavan on 18 May in the Ulster championship quarter-final in Kingspan Breffni Park.
Scotstown suffered a two-point loss to Ballybay in the Senior League on Sunday.
Monaghan finished sixth in Division 1 of the Allianz League above Roscommon and Cavan.