Substitute Roberto Firmino drilled home an added-time winner as Liverpool won an enthralling Champions League opener 3-2 at home to Paris St Germain.Last season’s beaten finalists had squandered a two-goal lead given to them by Daniel Sturridge, on his first start for the Reds in the competition, and James Milner’s penalty inside 36 minutes.However, PSG enjoyed a stroke of luck with the absence of an offside flag in the build-up to Thomas Meunier pulling one back, and when Neymar and Kylian Mbappe combined for the latter to score seven minutes from time, it appeared the damage had been done.However, Firmino – left out of the starting line-up with an eye injury sustained in Saturday’s win at Tottenham – struck in the second minute of added time as Jurgen Klopp’s side began another European adventure in dramatic style.However, it wasn't just the dramatic late winner that was dominating the headlines in the aftermath of the victory.Also Jurgen Klopp's men got the three points, it was Mohamed Salah's reaction to the winning goal that raised eyebrows and got everyone talking.After TV cameras turned to the dugout after the Brazilian's winner, fans sitting at home noticed Salah angrily throw a water bottle to the ground, which obviously sparked a lot of confusion among Liverpool fans.On first viewing, it did seem that the Egyptian was seemingly unhappy at the goal, but later replays also showed him raising his arms in celebration just seconds prior to the water bottle incident.It was a moment that didn't go unnoticed and didn't get ignored on BT Sports after the game.Whilst giving post-match analysis, former Manchester United defender Rio Ferdinand commented on Salah's actions and seemed to reassure potentially concerned Reds fans.“I hope so,” Ferdinand said on BT Sport when asked if Salah was celebrating.

“I think you have to [look at] the way this team is, the bond they have out there on the pitch.

“I think Salah’s celebrating in his own way. His hands were up at the beginning of that. The first picture [shows] his hands were up [celebrating].”