Leno said that in particular the way Hyypia explains himself in a "calm" way helps the players to have a clear understanding of what they need to do on the pitch.
"He is doing a great job," UEFA.com quotes Leno as saying. "He's great on a personal level and clear in what he wants to do with the team.
"He is not one to shout and jump around on the sidelines. He conveys his message in a calm manner."
Leverkusen are currently second in the Bundesliga, 13 points behind Bayern Munich.