Diego Costa says Chelsea cannot go through what they did last season.

Costa, who is set to stay at Stamford Bridge despite Atletico Madrid's desire to re-sign him, is confident there won't be a repeat.

He said: "We must not go worse, right? Our campaign last season was really bad. A team like Chelsea can't do it. We know the importance of our team and we have to be in a better position.

"The coach is working hard. We have noticed that he wants to do things well here and the fans are also hopeful with him. We were needing a change and now it is time to work."

He added: "Am I enjoying the trip? Actually not (he joked), because we are training hard (laughing). But it is a beautiful place. We will enjoy if we receive some free time."