torpedo moscow fans displayed a nazi banner during sunday 's game .
russian club been ordered to play two home games behind closed doors .
the latest punishment is torpedo 's fourth relating to racism this season .
they are already playing their next two home games in an empty stadium .
after supporters aimed monkey chants at zenit st petersburg forward hulk .
sunday 's game against arsenal tula was also marred by violence .
only women and children under 13 can attend their next three away games .