2018 Nitto ATP FINALS Novak Djokovic (SRB) defeated Marin Cilic (CRO) 76(7) 62 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Novak Djokovic (SRB) defeated Marin Cilic (CRO) 76(7) 62 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Novak Djokovic (SRB) defeated Marin Cilic (CRO) 76(7) 62 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Novak Djokovic (SRB) defeated Marin Cilic (CRO) 76(7) 62 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Semifinal Novak Djokovic (SRB) defeated Kevin Anderson (RSA) 62 62 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Semifinal Novak Djokovic (SRB) defeated Kevin Anderson (RSA) 62 62 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Semifinal Novak Djokovic (SRB) defeated Kevin Anderson (RSA) 62 62 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

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

2018 Nitto ATP FINALS FINAL Practice session. Alexander Zverev (GER) and Ivan Lendl (USA) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS FINAL Practice session. Alexander Zverev (GER) and Ivan Lendl (USA) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.