 Nyorai kuenderera mberi kweiyi ndima - Mehnert akatanga basa rake nekirabhu yekumusha kwake, Borussia Dortmund, uye akafambira mberi kuburikidza nechikwata chekuchengetedza, achisimudzirwa kuchikwata chekutanga chevakwikwidzi veEuropean panguva iyoyomuna 1997. Akaita kutanga kwake mumutambo wechipiri we UEFA Super Cup vachipesana neBarcelona, achitsiva Steffen Freund semunhu anotsiva mumaminitsi makumi maviri, uye akaita zvitatu muBundesliga, uye imwe muChampions League, vachipesana neSparta Prague. 