The France international has become Atletico’s leading man since joining from Real Sociedad for £24million in the summer of 2014.
However, he has struggled for form this season, netting just three times in 13 appearances for the Spanish giants, and has failed to hit the back of the net in his last six outings.
Cerezo has backed Griezmann to rediscover his best form for Atleti, who face Real Madrid after the international break, and says he has never doubted his ability.
"He hasn't had much luck at the start of this season. He had a fantastic end to the previous season and he is still considered one of the best three players in the world," Cerezo told Marca.
"The advantage is that he is younger and has more of a future than the other two. Everybody has their moments. It may be the case that he's not going through the best one right now, but I am convinced that it won't take long for him to be what we all want him to be once again, the Griezmann that he is.
"After all he has shown, there's no reason to doubt him or lose confidence in him because of playing five matches not so well. He will be the same old Griezmann against Real Madrid, one which is feared by defences and loved by Atletico fans.
"We have put in a lot of effort to keep him and to keep all the players. The problem Griezmann has had is that a series of news stories about other important European clubs wanting him has not benefited him.
"Griezmann is and will be an Atletico player. He is an important player and at an important club and he wants to win titles with Atletico. He may have had a start to the season which could have been better, but there is a lot left of the La Liga season for him to show how important he is for the club, and how important football is for him."