Chelsea have reportedly identified Atletico Madrid midfielder Thomas Partey as a possible alternative to Declan Rice.
The Blues are understood to be willing to do one more deal in their big-spending summer and regard West Ham United's Rice as their top target.
However, the Hammers are demanding more than £80m for the England international, forcing Chelsea to consider other options.
The Guardian reports that Thomas is one of the names on their shortlist, despite heavy speculation linking him with a move to Arsenal.
The Gunners are keen to sign either Thomas or Houssem Aouar before Monday's deadline, but have so far been unable to agree a fee for either midfielder.
Thomas is available for £45m due to a release clause in his contract, making him a cheaper option for Chelsea than Rice.