ATP Basel before cancellation: "Coronavirus has match balls to spoil the game" · tennisnet.com
ATP Photo Gallery From The Swiss Indoors Basel Tennis - 10sBalls.com • TennisBalls.com
Ivo Karlovic of Croatia prepares to return the ball to Switzerland's Roger Federer during their semi-final match at the Swiss Indoors ATP tennis tournament in Basel October 25, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND -