David Gray praised the "professionalism" of "real leader" Rocky Bushiri after the defender's late glancing header edged Hibernian past Ayr United and into the Scottish Cup quarter-finals.
Gray's side had to dig in to overcome the stubborn Championship leaders at Somerset Park and stretch their unbeaten run to 11 games, with Bushiri influential at both ends of the park.
"He's someone I've praised a lot recently not just because of how he's played but how he's been as a person at the club," head coach Gray said of his matchwinner.
"At the start of the season he wasn't getting the game-time he'd have liked and he had to be really patient.
"But he trained properly every single day. His level of professionalism is why, when he's been given the nod to step back in, he's played to a very good level.
"Since he's come back into the team he's been outstanding and a real leader at the back, which is great to see."