The 22-year-old performed well in holding midfield.
The likes of Joao Teixeira, Sheyi Ojo and Cameron Brannagan have all been given their chances in the competition. Against West Ham in their replay last night was no different.
The likes of Brad Smith, Tiago Ilori and Pedro Chirivella all started the game, as Klopp made several changes to his team for a game they eventually lost 2-1 after extra time.
Former Tottenham Hotspur talent Kevin Stewart was also handed a start.
It was in fact his performance in holding midfield that specifically caught the eye of one Sky Sports pundit. Ray Wilkins told Sky Sports News today (10/02/2016) that he was impressed with the Liverpool youngsters - especially Stewart:
"He (Klopp) obviously wanted to get Coutinho back in. We saw a lot of young men come in and play as well.
"I thought Kevin Stewart, the young midfield player, handled himself well.
"There was a couple of other young lads in there as well that did okay."
Liverpool snapped up former Tottenham under-19 captain Kevin Stewart on a free transfer. The utility man had been released by Spurs in the summer of 2014 but he got another chance at Premier League football at the club he supported as a boy.
The presence of former Tottenham youth coach Alex Inglethorpe at Liverpool was a big factor in his arrival and he has since spent time on loan at Burton Albion, Cheltenham Town and Swindon Town since heading to Liverpool.
He has certainly been one of the more impressive Liverpool youngsters so far and will be hoping to add to his four appearances for the club in the months to come.