Bayer Leverkusen suffered a shock 4-3 defeat at third tier Elversberg on Saturday to crash out of the German Cup first round. Fellow Bundesliga side Cologne were also eliminated 4-3 on penalties after a 2-2 draw at second division Jahn Regensburg. Wolfsburg, under new coach Niko Kovac, prevailed 1-0 late on at fourth tier Carl Zeiss Jena. Top flight Bochum also won 3-0 at fourth division Viktoria Berlin. Leverkusen, third in the Bundesliga last term and now Champions League entrants, suffered an early blow in their first competitive outing of the season with Jannik Rochelt netting just 3 minut…