Ryan Nelsen believes West Ham have issued a statement of intent by tying Winston Reid to a new deal.
Tottenham are keen for striker Shaquile Coulthirst to continue his development out on loan after his spell at Southend.
The 29-year-old Brazilian joined the Rossoblu on a four-year deal in 2009 but after scoring just 15 league goals for the Sardinians it appeared he would move on in the summer.
However, a statement published on cagliaricalcio.net read: "Cagliari announce that the player Miguel Anderson Da Silva 'Nene' has renewed his contract with the Rossoblu for another year."
Nene's best individual contribution to the Cagliari cause came in December 2010 as he scored a hat-trick in a 3-0 home victory over Catania.