Michal Samulski on Twitter: "TC Weissenhof in Stuttgart is ready for @MercedesCup (pic.) with Federer, Raonic, Kyrgios, Berdych and Shapovalov in the field. https://t.co/JxlRlYWcYE" / Twitter
Tennis in Stuttgart: ATP-Turnier auf dem Weißenhof - SWR Aktuell
Federer marks No.1 ranking with 98th title in Stuttgart - EgyptToday