2018 Nitto ATP FINALS O2 ARENA Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

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 Marin Cilic (CRO) defeated John Isner (USA) 67(2) 63 64 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS FINAL Alexander Zverev (GER) defeated Novak Djokovic (SRB) 64 63 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS FINAL Alexander Zverev (GER) defeated Novak Djokovic (SRB) 64 63 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS FINAL Alexander Zverev (GER) defeated Novak Djokovic (SRB) 64 63 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS FINAL Alexander Zverev (GER) defeated Novak Djokovic (SRB) 64 63 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Roger Federer (SUI) defeated Kevin Anderson (RSA) 64 63 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2018 Nitto ATP FINALS Roger Federer (SUI) defeated Kevin Anderson (RSA) 64 63 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

Melbourne, 31/1/2015 Serena WILLIAMS (USA) defeated Maria SHARAPOVA (RUS) 6-3 7-6 (7/5) to win her 19th Grand Slam title. Ladies Final. Photo Ray Giubilo