Brighton and Hove Albion boss has said defender Leon Balogun has to be ready to step in at any time.
The summer signing is Brighton's third-choice centre-back, just behind regulars Shane Duffy and Lewis Dunk.
During the week, he came off the bench against Crystal Palace after Duffy was sent off for headbutting an opponent. Balogun's first touch in an M23 derby was a well-executed goal to help the Seagulls to a 3-1 victory over their archrivals.
And with the Ireland defender set to sit out the next three games, Balogun is set to fill in his role, starting away at Burnley on Saturday.