"Personally I'm very happy to see them here and to play against them every now and then," said Mata.
"I think it's very good for the league because they are top players - they can score, they can assist and change the game.
"For me Soldado, Navas, Negredo are friends - more than team-mates or rivals - so I'm very happy to see them here. I wish them the best but not when they play against us."
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