Firmino did not train on Monday, but, made himself available and came off the bench to score the added-time victor in the thrilling 3-2 victory over PSG at Anfield.
But the impetus quickly swung back in the favour of the hosts after Georginio Wijnaldum went down under contact from Juan Bernat inside the area, and Milner slotted the resulting penalty into the bottom-right corner of the net on 36 minutes.
The match between Liverpool and PSG was billed as the two best attacks in world football coming head-to-head, and the game did not disappoint as it ended up 3-2 in Liverpool's favour, with Roberto Firmino grabbing the headlines with a dramatic late goal.
The Brazil global made the difference with a brilliant 91st-minute victor, celebrating by covering up his eye, but Klopp made sure he highlighted Sturridge's contribution.
Jurgen Klopp has a near-full squad to choose from ahead of the game, but that could cause a headache for the German boss with so many players to slot into the starting XI. Bobby's come off the bench and done that.
"I was thinking about that today". I would say that one, two, three years ago probably everyone would have thought that is a mountain we can not climb.
The Reds dominated much of proceedings, however they allowed PSG to come back from two goals down and Robertson admitted he thought the Reds may have to settle for a draw. "Obviously we lost a goal just before half-time and so 2-1's a wee bit uncomfortable", he said.
"It was really important we started like we did".
"It's a tough atmosphere to play in once they're behind us".
"Bobby's done a great finish so fair play to him and like I said, all the lads have done brilliant today so it was a real team effort".