Manchester City defender Martin Demichelis has signed a one-year contract extension at the club. The Argentina international’s current deal was set to run out at the end of this season. The new one will keep him at the club until the end of 2015/16. Demichelis, 34, has made 30 appearances in all competitions this season. “I want to say that I am really proud and happy to have extended my contract for another year,” he told the club’s website.  Demichelis joined Manchester City in September 2013 from Atletico Madrid for a reported £4.2m.