German swimming coach Bernd Berkhahn still hopes that the open water events at the Paris Olympics can take place as planned in the River Seine but has also called for a plan B. A report published last week said that the water quality of the Seine river was still not good enough to organize competitions there as planned. “The race in the Seine is a great challenge in terms of its demands. We have to put a lot of effort into preparing for it in training. I hope these efforts were not in vain,” Berkhahn said in an interview published by the German Swimming Federation. “Of course I would also like…