Liverpool sensationally dumped Barcelona out of the Champions League earlier this month.
That stunning 4-0 destruction of the Catalan giants is said to have led to a major re-think at the Camp Nou.
Barcelona have been heavily linked with French striker Antoine Griezmann who announced on Tuesday he would be leaving Atletico Madrid this summer.
The La Liga winners, who have already acquired the services of Ajax midfielder Frenkie de Jong, are also said to be the favourites in the race to sign his team-mate Matthijs de Ligt.
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Barca players set for a potential departure include former Liverpool man Philippe Coutinho, Everton loanee Andre Gomes and defender Samuel Umtiti.
The Reds' dramatic comeback upset the Catalan giants, and the dressing room fallout which reportedly followed seemed to stem from their failure to qualify for the final - which will be held in Madrid on June 1.
And this major squad overhaul is said to be in reaction to Ernesto Valverde's side's 4-0 humiliation at Anfield.
Having watched rivals Real Madrid lift the prestigious trophy four times in five years, Lionel Messi was desperate to lead Barca to their sixth title.
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The Argentina talisman made it clear to his team-mates at the start of the 2018/19 season of his intentions to reclaim Europe's top prize.
But Jurgen Klopp's side's remarkable triumph means Liverpool are eyeing up number six, while Barcelona are lining up a major spending spree.
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