West Ham are set to table a deal worth £25million for Swansea defender Alfie Mawson.
The England hopeful has been a rare bright spot for the Swans during a hugely disappointing campaign.
The Hammers want to add the 23-year-old to their squad when the January window reopens next month and are making early moves to ensure a deal can be completed early.
Swansea have already rejected an £18million offer from West Ham, telling the east London club they would only consider a deal worth £25million.