Critics have begun to question the contribution of Salah this season but Klopp insists he has worked harder than at any time in his Liverpool career.
Salah has appeared to lack some sharpness following his disappointing World Cup campaign with Egypt in Russian Federation during the summer.
Salah scored Liverpool's opening goal of the season against West Ham in August, but has not scored since his strike in the Reds' win over Brighton four weeks ago.
However, Salah has failed to find the net in his last three games in all competitions and has struck a frustrated figure.
He made an instant impact with a spectacular overhead kick against Manchester United in MI but despite impressing in training, Shaqiri has been limited to just 27 minutes of Premier League action in four matches, plus a five-minute cameo in the Champions League.
"On the defensive side, the past two games he was outstanding, perfect", he added. But he is still a threat.
"He had fantastic offensive situations in both of the last games".
"I'd love to play in their front three, I'd fit in flawless!" "It is much too early to be thinking about something like that and making a big thing of it", Klopp said of Salah's goals return.
Klopp put Firmino on the bench but brought him on with about 20 minutes to go and he scored the added-time victor to extend Liverpool's 100% record to six matches.
While Salah struck a brace on worldwide duty for Egypt, he has not found the net in his last three club appearances in all competitions.
Even manager Jurgen Klopp admitted he thought the 26-year-old had "no chance" of playing when he saw him on Monday, but Mane was not prepared to give up on his teammate. We have quality in the team and I think it is mentally free to go forward and believe it until the end.
While he has by no means endured a torrid start to the season, Mo Salah has also not quite looked at his best and against PSG, he looked exhausted.
"None of the results we have had this season would have been possible without the greed you have seen, without the aggression you see".