Die Swiss Indoors Basel müssen auch 2021 abgesagt werden
Tennis - ATP 500 - Basel Open - St. Jakobshalle, Basel, Switzerland - October 28, 2018 Switzerland's Roger Federer in action during the singles final against Romania's Marius Copil REUTERS/Arnd Wiegmann Stock Photo - Alamy
Roger Federer opens with victory at Swiss Indoors in Basel | Tennis News | Sky Sports
Swiss Indoors Basel - Ticketcorner
Tennis: Roger Federer triumphiert zum neunten Mal in Basel - DER SPIEGEL