West Brom have warned Arsenal they must get serious if Jonny Evans is to move to the Emirates.
The Sun says the Gunners have been told that even a bid of £16million for the former Manchester United defender, 28, will not be enough.
The Baggies only paid an initial £6m for the Northern Irishman after he was dumped by Louis van Gaal last summer.
Gunners boss Arsene Wenger is desperate to get a deal done as Per Mertesacker (knee) is out for five months, Gabriel (ankle) for eight weeks and Laurent Koscielny is not match-fit.
Valencia's Shkodran Mustafi and Fenerbahce's Simon Kjaer are also on Wenger's radar.