Alisson had not played since pulling his hamstring in a win at Crystal Palace on 5 October.
Stand-in stopper Caoimhin Kelleher largely impressed when he deputised, though was at fault for Newcastle’s late equaliser in a 3-3 draw last Wednesday.
Brazil’s Alisson was brought straight back into the starting XI and made good saves to deny Bryan Gil, Miguel Gutierrez and Yaser Asprilla in the first half, before the 32-year-old kept out Arnaut Danjuma from a tight angle in the second.
Former Manchester United defender Daley Blind also had a good chance in the first half but mis-hit Gutierrez’s cross when unmarked in the area.
As for Liverpool, Joe Gomez had an early header tipped over and Darwin Nunez was denied when one-on-one in the first half by Gazzaniga.
Against a Girona team who have lost five of their six matches in the Champions League this season, it was predictably Salah who made the difference as he so often does for Liverpool.
The Egypt forward has now scored 16 goals in 22 games in all competitions, and seven in his past six.
Liverpool have now won 16 of their past 18 matches – including two draws – since losing to Nottingham Forest on 14 September.
