Mainz, which failed to qualify for the Europa League and was knocked out in the first round of the German Cup, was left to rue a penalty appeal that wasn't given in the first half. The Japan striker created the home side's best chance six minutes later with a fine cross, but Julian Baumgartlinger was unable to direct his volley on target. Mainz brought on Devante Parker, younger brother of German-American striker Shawn, for his Bundesliga debut with eight minutes remaining, but neither side could force a breakthrough.