The likes of Liverpool and Bayern Munich may be chasing him, along with Barcelona.
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Per The Mail, he is willing to take a job in the Premier League, with the Reds having him on their shortlist.
The club were hoping to appoint ex-player Xabi Alonso, but he has rejected the job.
Alonso is happy to stay at current Bundesliga leaders Bayer Leverkusen for at least another season.