BERLIN - Relegation-threatened Arminia Bielefeld sacked coach Michael Frontzeck on Sunday after a 6-0 defeat at Borussia Dortmund on Saturday left them third from bottom with one match left. The bottom two are automatically relegated while the third team play a relegation playoff against the third-place finisher in Bundesliga 2. Karlsruhe SC are bottom on 26 points with Energie Cottbus on 27. Arminia also have 27 points but a better goal difference. "The board voted to part company with chief coach Michael Frontzeck immediately," Arminia said in a statement. The club said there was no decision yet on his successor. The 45-year-old former Germany international took over at the start of the season. Arminia play Hanover 96 in their season finale next week.