The former Valencia man looks nothing like the shot-shy striker of last season, having successfully grasped another opportunity during a rare outing in the starting line-up.
The striker met a corner from the left with an impeccable flicked header that flew past Rui Patricio before he had chance to react.
The goal took Alcacer's tally to five goals in ten games in all competitions so far this season, a very respectable return.
Check out the goal for yourself below:
EL GOL DE PACO ALCÁCER. 1-0 #BarçaSporting #UCL pic.twitter.com/frY59WEPEY
— Ronald Morales (FCB) (@RonaldJose_FCB) 5 December 2017