The striker was asked by reporters about his future and said: "Sorry, but I really do not want to talk about the market. I can answer questions on the team or on preseason, if you like. Otherwise, I am sorry.
"My future? We'll see."
Meanwhile, Diego was thrilled with his goal scoring debut yesterday.
"It was the perfect debut," he said after victory over Seongnam, "because I have played, we won and I scored.
"I haven't played for two months, it could not have gone better. I am very happy. Sure, there are some things to improve, but we are at the beginning, everything is good."