Liverpool have received a significant boost ahead of their massive Champions League quarter-final clash with Paris Saint-Germain, as striker Alexander Isak has returned to the squad after a lengthy 15-week injury layoff.

Isak's return comes at a critical time for manager Arne Slot. The Reds are looking to bounce back from a difficult 4-0 defeat to Manchester City in the FA Cup and reignite their European campaign. The Swedish international, a club-record £125 million signing from Newcastle, has been sidelined since December after suffering an ankle fracture and fibula injury in a challenge with Tottenham's Micky van de Ven.

Having managed just 16 appearances for Liverpool so far, Isak will be desperate to make a meaningful impact. His return to full training last week and subsequent inclusion on the flight to Paris provides a timely injection of quality and firepower for a side in need of a spark.

This tie is a heavyweight rematch of last season's dramatic round of 16 encounter. Liverpool won the first leg in Paris, but PSG fought back at Anfield and ultimately triumphed in a penalty shootout. The French champions used that victory as a springboard, eventually going on to lift their first-ever Champions League trophy.

Facing a PSG side brimming with confidence and considered favorites, Liverpool's task in Paris is daunting. The return of a fit and motivated Alexander Isak, however, gives the Reds a potent weapon and a renewed sense of belief as they head into one of the biggest nights of their season.