Arsenal boss Mikel Arteta is prepared to see Granit Xhaka leave at the end of the season.
The Sun says Bayer Leverkusen are in touch with the midfielder, who has just over a year to run on his contract.
Arteta won't stand in Xhaka's way as Arsenal line up a move for West Ham captain Declan Rice.
And Bayer's interest could bring a swap involving winger Moussa Diaby into play.
Arsenal retain a long-term interest in Diaby and will raise the Frenchman's situation during transfer talks.