Nuremberg striker Jan Koller could be banned and sanctioned by the German Football Association after spitting on Hanover defender Christian Schulz in day 22 of the Bundesliga. Bild revealed on Monday that the referee mentioned the incident in his report. The Czech striker has also been caught on TV and the bosses will take it into consideration to impose his sanction. Koller moved to the Nuremberg coming from Monaco after spending a year in the Ligue 1. The 35-year old striker had a previous spell in the Bundesliga as he made all his glory with Dortmund scoring 59 goals in five seasons.