Bayer Leverkusen’s last defeat in any competition came on May 27 last year at the end of the Bundesliga season when they lost 3-0 at Bochum. They meet again on Sunday in Bochum with the hosts still not safe and recently-crowned German Leverkusen gunning for an unbeaten season and a treble. Bochum coach Heiko Butscher, who has won two games in a row, is staying positive in his messages to his team. “If we emphasize everything that makes Leverkusen strong and only point out their strengths, I’m scaring my team,” he told reporters on Friday. His problem is that Leverkusen coach Xabi Alonso, despi…