Record by referee Robert Hartmann CompetitionDateMatchMatchRes.Bundesliga10.12.2011Mainz 05 - HamburgM05 - HSV0:0Bundesliga20.04.2012Mainz 05 - WolfsburgM05 - WOB0:0Bundesliga22.11.2014Schalke - WolfsburgS04 - WOB3:2