Manchester United boss Sir Alex Ferguson has praised the performances of defender Rio Ferdinand and Nemanja Vidic in the Champions League win over FC Porto.

"They did well. We showed good concentration at the back and defended very well," he said.

"If we get back to that foundation of not conceding goals, we can do well. We had stability at the back with the recognition of Ferdinand and Vidic and that was a great start.

"I couldn't see the dangers. I thought we controlled that part very well. Nothing really bothered us."