His trickery, poise on the ball, dribbling ability and his eye for goal have made him one of the Premier League's biggest commodities.
Lallana hit 10 goals for the Saints last season as they secured a top-eight finish.
He was included in the PFA's Team of the Year and is in Roy Hodgson's England squad for the World Cup.
Here, Express Sport takes a look at what Lallana could offer Liverpool should he join.
Adam Lallana was irrepressible for Southampton last season[GETTY]
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