2018 Nitto ATP FINALS Alexander Zverev (GER) defeated Marin Cilic (CRO) 76(5) 76(1) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Novak Djokovic (SRB) Practice session Photo © Ray Giubilo This image may not be reproduced or sold to third parties.