Tony Mowbray admitted the impact from substitutes was something that pleased him in the Emirates FA Cup defeat to Hull City.
Rovers lacked life at times in the contest but the introduction of striker Danny Graham and playmaker Bradley Dack gave the side fresh ideas.
Both entered the action on the hour mark, with Graham twice going close to nicking an equaliser for the hosts against one of his former sides.
And despite not finding the back of the net, Mowbray admitted there were positive signs from his two attacking substitutions.
"I think Danny and Bradley coming on to the pitch swung the balance of the game in our favour," the boss reflected.
"Danny was fantastic when he came on, using his experience well, shielding the ball.
"Bradley and Danny came on, which allowed us to get Craig [Conway] higher up the pitch and the ball stuck, that’s what happened.
"The ball stayed up the pitch longer so we could get our wide players higher up the pitch and push the midfield on."