France Under-19 defender Steven Moreira has signed his first professional contract with Ligue 1 club Rennes.
Montpellier coach Jean Fernandez has resigned after overseeing a run of seven Ligue 1 games without victory.
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.