Los Che will meet Atalanta in Italy on Wednesday night for the first-leg of their Champions League round of 16 tie.
Celades said, "Atalanta's season has been simply remarkable, they really enjoy their football and play without inhibitions. We lost the ball many times in defence lately, so we have discussed that.
“We will try to use all the weapons at our disposal to defuse the goal bomb that is Atalanta."
Valencia have just one point from their last three competitive games and Celades added: “We haven't been doing very well on our travels lately, but in the Champions League we won away to Ajax and Chelsea, so we hope to continue that trend instead.
“I thank the fans and it's also thanks to them that we are here. It makes the difference when they are in the stands. I hope they can enjoy the game, because Valencia have not played in the Champions League Round of 16 for many years."