The Argentine midfielder signed for the Reds in a £35m deal from Brighton in 2023.
His move was facilitated by a release clause in his contract with the Seagulls, with then-Reds boss Klopp convincing him to join.
“When he was about to play in Qatar, we sat down with Brighton and negotiated a good release clause,” Mac Allister Snr recalled to RG.
“So that he could deliver a good performance in the World Cup and go to a bigger team, which he did.
“We chose Liverpool because Klopp wanted him a lot, and they were going through a rebuild. Klopp fell in love with him and gave him a lot of opportunities, which he did not waste.
“He delivered a fantastic World Cup and a very good Copa America and has shown unique attributes. People mostly talk about Alexis’ offensive abilities, but he also has the seventh-most recoveries in the Premier League.
“There are many footballers who attack well, many who defend well, but there aren’t many like Alexis who attack and defend well.”