Momo Sissoko has jumped to the support of underfire Juventus teammates Diego and Felipe Melo.

The Brazilian pair have failed to live up to expectations since their summer arrival.

But Sissoko says: "Juve has spent so much on Diego and Melo. They're currently going through a difficult moment, but I believe they can both help the team, already starting with the challenge against Catania on Sunday."

He added: "I have a contract until 2014 and I'm happy here."