There aren’t many people who can claim to have played Roger Federer in an international tennis tournament and emerged victorious - but former German tennis pro Markus Menzler can! Between 1997 and 2001, he pursued a professional career and celebrated a number of memorable wins. After his retirement from professional sport, he became a tennis trainer and still spends most of his time firing balls on indoor and outdoor courts. Such physical exertion has, however, taken its toll on his body. In April 2019, after many years of intense teaching and training, he was diagnosed with a so-called acute bone bruise in one femoral head.