Bayer Leverkusen coach Peter Bosz and goalkeeper Lukas Hradecky spoke ahead of Tuesday's UEFA Champions League group match against Juventus in Turin.
Both sides will be looking for their first win of the Champions League season.
Leverkusen suffered a home defeat to Lokomotiv Moscow in their opening game, while Juventus squandered a two-goal lead at Atletico Madrid.
Bosz admitted it will be a ''challenging match'' and they have a ''very hard job'' trying to stop Juventus striker Cristiano Ronaldo.
