Having had their FA Cup dreams shattered with the 5-0 semi-final defeat by Stoke, the team picked themselves up to beat Arsenal last weekend but then lost disappointingly at Fulham in midweek.
That defeat ended any outside chance Wanderers had of sneaking into European qualification, and Coyle is keen not to allow months of hard work go to waste in the final few matches.
"There is no doubt, given how hard the players have worked since pre-season, that physical and mental fatigue play a part," he said.
"It absolutely comes in but you have to be strong and give everything you can and recognise there are four games to go, and we have to make sure whoever is asked to play gives everything they can.
"The margins are so fine and when you have that lack of concentration for any given moment you can be punished - it happened the other night at Fulham - so we have to make sure we address that."
Source: PA
Source: PA