Vermaelen looked set to join Roma but allegedly is holding out for a Premier League return.
West Ham United's summer transfer business is in full swing and it appears as though another signing could be on the cards, with Spanish outlet Sport claiming that Barcelona are expecting an offer from the Premier League club for defender Thomas Vermaelen.
Vermaelen has not adapted well to life at the Nou Camp since moving from Arsenal two years ago, with injuries and stiff competition at the back limiting him to just 21 appearances for the Catalan club.
With Barca having signed Samuel Umtiti from Lyon, Vermaelen is widely expected to leave this summer, and despite reported interest from several clubs around Europe including West Ham it had looked as though he was set to join Italian club Roma.
However, Spanish paper Sport claim that Roma's offer for the 30-year-old has been deemed inadequate by the Barcelona hierarchy and that the La Liga giants are instead waiting for the Hammers to firm up their alleged interest.
West Ham are likely to be in the market for a new defender this summer after James Tomkins' £12 million move to Crystal Palace, and they could be willing to take a punt on the man who was so impressive for Arsenal before his move to Spain.
The 30-year-old is valued at around €12 million (£10.2 million) and the Hammers have allegedly made their interest known to Barca.
Vermaelen is thought to favour a move back to the Premier League, and Barca are reportedly expecting an official bid to come in from West Ham this summer, although it remains to be seen whether Slaven Bilic would be willing to gamble on his injury record.