Bayern Munich sporting director Christoph Freund says the club are trying to figure out why they have suffered so many muscle injuries this season after winger Kingsley Coman became the latest victim. The Bavarians have recorded 20 muscle injuries this term and Coman being substituted in Saturday’s 2-0 Bundesliga win over Cologne leaves them short in wide areas for Wednesday’s Champions League quarter-final second leg at home to Arsenal. Fellow winger Serge Gnabry is also set to miss out with a muscle injury, with the score locked at 2-2. “Unfortunately, it’s been the case throughout the seaso…