Chelsea have talked about using Marcos Alonso as part of a part-exchange deal to sign Barcelona striker Pierre-Emerick Aubameyang.
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Thomas Tuchel is desperate to bolster his frontline after Romelu Lukaku returned to Inter Milan on a season-long loan earlier this summer.
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Aubameyang joined Barcelona in the January transfer window after his contract with Arsenal expired, and he’s scored 11 goals in 13 appearances for the Catalans.
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However, the arrival of Robert Lewandowski has pushed Aubameyang down the pecking order, while Barcelona is desperate to raise funds to alleviate their financial woes.
Barcelona is seeking around £21 million for Aubameyang, who is willing to return to London.