Mata believes they have the quality in the current squad to fill the void left by the new PSG midfielder.
"Ander is a friend and on a personal note I will miss him a lot. We know he is a very good player and I wish him all the best but we need to keep going and go with the players we have," Mata said.
"With the quality we have in midfield. The players we have can play very good and we need to move on."