Bayer Leverkusen suffered a shock 4-3 defeat at third tier Elversberg on Saturday to crash out of the German Cup first round. Leverkusen, third in the Bundesliga last term and Champions League entrants this season, looked badly off the pace in defence in their first competitive outing of the campaign and were deservedly beaten. There were also wins for second-tier sides Heidenheim and Paderborn, who battered fifth tier Einheit Wernigerode 10-0 away. But fellow second-division outfit Hansa Rostock lost 1-0 at fourth tier Lübeck. Bundesliga side Bochum earlier won 3-0 at fourth division Viktoria…