Inter Milan's summer signing Nelson Rivas is ready to answer coach Roberto Mancini's SOS.

The Colombia international is set to be called up by Mancini this week to cover for the loss of injured star defender Cristian Chivu.

"The main characteristics that brought me here from River Plate are strength and speed," said Rivas, who is yet to make his Inter debut. "The nickname Tyson certainly doesn't annoy me, there's some truth there.

"I've already played in big games in my career and I want to make an important immediate contribution," he insisted.

"Cordoba will be an important ally. I have already spoken to him lots and he has helped me by explaining things. I know that I will be able to count on him."