West Ham have offered £40m for Chelsea and England midfielder Conor Gallagher.
Gallagher has two years left on his contract and Chelsea are believed to be willing to extend it.
Any potential departure would likely have to be driven by Gallagher himself.
The England midfielder is on Chelsea’s tour of the United States and scored in the win over Brighton on Sunday. As things stand, boss Mauricio Pochettino expects him to join the squad next season.
Sky Sports News understands that Chelsea value him well over £40m.
Gallagher is one of several midfielders West Ham are considering following Declan Rice’s move to Arsenal for £105m.
The Hammers had a £45m bid rejected by Fulham for Joao Palhinha and remain committed to Southampton captain James Ward-Prowse, Juventus’ Denis Zakaria and Ajax’s Edson Alvarez.
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Harry Maguire is being watched closely by clubs in the Premier League and abroad, with West Ham among those interested in the England international.
The Hammers are believed to be exploring the option of a loan or permanent deal for the 30-year-old defender, who was recently told he will no longer be Man Utd captain and may look to move elsewhere.
However, they are aware that wages could be an issue should a deal be reached between the clubs.
United manager Erik ten Hag has always maintained that any decision will indeed rest with the player, who is contracted to the club until the summer of 2025.
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Who will be on the move this summer when the transfer window opens on June 14 and closes at 11 p.m. on September 1 in England and midnight in Scotland?
Keep up to date with all the latest transfer news and rumors in our dedicated transfer center blog on Sky Sports digital platforms. You can also catch up on the ins, outs and analysis at Sky Sports News.