Alonso, who scored as Liverpool won the 2005 Champions League final, was reportedly the Reds' top target to replace Jurgen Klopp as manager at the end of last season.

The 42-year-old instead opted to remain in Germany, having led Leverkusen to their first ever Bundesliga title and the German Cup without losing a game, as well as reaching the Europa League final.

Liverpool's Dutch manager Arne Slot reacts as he speaks during a press conference, at the Anfield stadium, in Liverpool, north west England. AFP

Slot was handed the daunting task of succeeding Klopp, but has made a remarkable start with 13 wins and one draw from his opening 15 games in all competitions.

Liverpool sit top of the Premier League, have reached the League Cup quarter-finals and are off to a perfect start in the Champions League thanks to victories over AC Milan, Bologna and RB Leipzig.

"It is a big European game," said Slot at his pre-match press conference.

"Also for what Xabi Alonso did for this club, especially in Europe as well. Maybe more for how he manages Leverkusen, how he manages them domestically. In Europe last season they were incredible as well.

"I think this season they are just as good but a bit more unlucky when it comes to results."

Leverkusen have struggled to match their standards from last season as they sit fourth in the Bundesliga, seven points behind leaders Bayern Munich.

But they are also well on course for the knockout stages of the Champions League after taking seven points from their opening three games.

"It's difficult to say what makes him a special manager if you don't work with him on a daily basis but he is, that is clear," added Slot on Alonso.

"Bottom of the league when he took over, didn't spend much, mainly the same players and they only lost in the final of the Europa League.

"He worked with incredible managers in the past and played at the highest levels. So he also knows and understands what players feel at certain moments."

Liverpool needed a much-improved second-half performance to beat Brighton 2-1 on Saturday to go top of the Premier League.

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