ATP • WTA Photo Gallery From Basel & Singapore Tennis

Germany’s Alexander Zverev returns a ball to Holland’s Robin Haase during their first round match at the Swiss Indoors tennis tournament at the St. Jakobshalle in Basel, Switzerland, 24 October 2018. EPA-EFE/GEORGIOS KEFALAS

Switzerland’s Roger Federer in action during his first round match against Serbia’s Filip Krajinovic at the Swiss Indoors tennis tournament in Basel, Switzerland, 23 October 2018. EPA-EFE/GEORGIOS KEFALAS

Sloane Stephens of the USA in action during her singles round robin match against Kiki Bertens of the Netherlands at the BNP Paribas WTA Finals 2018 held at the Indoor Stadium in Singapore, 24 October 2018. EPA-EFE/WALLACE WOON

Holland’s Robin Haase returns a ball to Germany’s Alexander Zverev during their first round match at the Swiss Indoors tennis tournament at the St. Jakobshalle in Basel, Switzerland, 24 October 2018. EPA-EFE/GEORGIOS KEFALAS

Angelique Kerber of Germany in action during her singles round robin match against Naomi Osaka of Japan at the BNP Paribas WTA Finals 2018 held at the Indoor Stadium in Singapore, 24 October 2018. EPA-EFE/WALLACE WOON