Diego Simeone said he's not worried about rumors linking Antoine Griezmann to Barcelona. 

"Griezmann is our captain, he is important, I am not worried at all," said Simeone.

Simeone added that the most important moves for Atletico Madrid this summer are to replace their fullbacks.

"The full-backs are the most important. If you have good full-backs then you have a great chance. If not, you will have problems. It is the most difficult position of all. The full-backs give life," added Simeone.