Mundo Deportivo says the trio of Antonio Rudiger, club-captain Cesar Azpilicueta, and Christian Pulisic are all targets for Barcelona boss Xavi.
Rudiger and Azpilicueta are entering the final months of their Chelsea contracts and are summer targets.
The signing of Pulisic meanwhile comes sooner on the agenda, with Barca keen on a January loan deal.
The American international had struggled with an ankle injury this season, featuring in just six Premier League games this campaign.
And only two of those have been from the start, meaning a loan move to rack up some much needed match minutes could be on the cards.
That suits cash-strapped Barcelona, who don't have the funds to cover big money transfers. As a result they are targeting loan deals and free transfers.
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