Bayern Munich boss Louis van Gaal has been forced to divide his team over two training sessions in an attempt to avoid spreading a virus. "The rest will train at a different time. We can only hope that we don't catch anything," defender Philipp Lahm said on the club's website. "That is bad because we have some important midweek matches coming up and we expect even more players to fall ill in the coming weeks," said Dutch manager Van Gaal. Bayern aim to maintain their Bundesliga winning streak when they take on Mohamed Zidan's Borussia Dortmund on Saturday, before hosting Fiorentina in midweek.