"I think it is going to be a fight for the ball," said Mata. "They are a team with quality players, quality in the midfield area and in their league they always have the ball and a lot of chances to score.
"So tomorrow we will try to play our football as we did in the last two months, enjoy ourselves and the level we are playing at.
"We expect a rival team always wanting the ball."
Chelsea are level on four points with Shakhtar at the top of the group.