The Anfield outfit parted with over £36 million - a club record - to bring the winger in from Roma after a successful two-year stint at the Italian capital.
Having failed to secure his signature while at Basel, with the player opting for a £12m move to Chelsea at the turn of 2014, the Kops went back for the Egypt international who had rejuvenated his disappointing Stamford Bridge career in Italy - first, at Fiorentina and then, the Stadio Olimpico.
In spite of his return to form, Gerrard revealed he, alongside 'a lot' of fans had reservations regarding his purchase.
But, following another five-star performance against West Ham United at the London Stadium where he netted his 11th and 12th goals of the campaign, the former Liverpool captain has labelled the 25-year-old as the club’s ‘best player by a mile’.
“I watched him a lot at Chelsea, and it didn’t really take off for him when he was a Chelsea player,” Gerrard said on BT Sport.
“Of course he hit real top form over at Roma, but you’re thinking, ‘is he a player suited to the Premier League?“And when he first came I, along with a lot of Liverpool fans, wasn’t totally sure how it was going to work. But he’s come in and he’s been absolutely top-drawer this season. He’s been Liverpool’s best player by a mile.”