"It's true he was not happy because he was not playing, but we don't have any problem with Milan," said Benitez.
"There's been a lot of talking but the most important thing is to work hard. I've spoken to Milan. He knows he scored a lot of goals before his injury problem, but since then he's needed goals.
"He needs to be focused on the game and playing well. By working hard and showing his best, the goals will come.
"When a player doesn't play it's because another team mates is needed. I'm sure he understands now that the most important thing is the team because the better the side plays, the more he will score goals in future.
"As a manager you must think about the whole squad and always pick the side to do the right job on the day. In the Champions League we will lose a lot of players, like Morientes, for example and we need Milan to be at his best."