Porto coach Vitor Pereira doesn't believe Andre Villas-Boas will feel undermined at Chelsea by Jose Mourinho.

It's been revealed Chelsea players are still texting the Real Madrid coach.

But Pereira said: "I consider it normal. After working with the players it is natural to create bonds of friendship. Me and Andre (Villas-Boas) also exchange messages, because we are friends.

"It is a natural thing that happens."