Blake has been quoted as saying he would not like to score against his old club, but Coyle feels the player's commitment to Wanderers will not be in question once play gets under way.
"Robbie Blake is a terrific professional," Coyle said.
"He will start tomorrow night and do his utmost to show the abilities and standards he has.
"It will be an emotional night for him because he went through an awful lot with Burnley in a couple of different spells, but there is no doubt that when he is out there he will be doing his utmost to try and win the game.
"Robbie was a terrific servant to Burnley and regardless of what the fans think about myself, they will give him a very warm reception."