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Lallana signed for the Seagulls in the summer of 2020, committing his future to the club until 2023 after departing Premier League champions Liverpool.
An attacking midfielder, but capable of playing anywhere across the middle of the park, the 32-year-old began his career down the coast at Southampton.
He made his debut for the Saints in August 2006, before having a brief loan spell at Bournemouth.
The England international would go onto become a regular for Southampton, helping them to back-to-back promotions from League One to the Premier League.
He would be appointed captain at St Mary’s in 2012 and then made his England debut in November 2013, before going onto be shortlisted for the PFA Player of the Year and making the Team of the Year less than 12 months later.
It was that impressive campaign that led to Brendan Rogers taking Lallana to Liverpool in a £25 million move.
It proved to be a hugely successful move for him, as he would go onto win the Champions League, Premier League, UEFA Super Cup and Club World Cup, as well as finishing runners-up in the Europa League and League Cup in a six-year spell on Merseyside.
He called time on his Reds career in 2020, signing for the Albion in July.
After making his debut in Albion's opening match of the 2020/21 Premier League campaign, his first goal came in march of that season, opening the scoring in a 2-1 defeat to Leicester City.
Lallana: We are dealing with pressure in our own way
Midfielder wants level-headed approach as Albion enter the final straight of the campaign.
Lallana: It was a professional performance
Midfielder on a massive three points against one of his former clubs.
Hammond: Lallana the best I played with
Former midfielder fully expected Lallana to have terrific career.
Lallana: I believe in this squad
Midfielder rues missed chances against West Brom but says Albion will bounce back.