2017 Nitto ATP FINALS Jack Sock (USA) defeated Marin Cilic (CRO) 57 62 76(4) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Jack Sock (USA) defeated Marin Cilic (CRO) 57 62 76(4) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) defeated Jack Sock (USA) 64 76 (4) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) vs Alexander Zverev (GER) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Rafael Nadal is presented with the ATP World No 1 Award presented by Emirates. The presentation was made by Chris Kermode,Executive Chairman and President of the ATP,and Jon Sheppard of Emirates. Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) defeated Jack Sock (USA) 64 76(4) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) defeated Jack Sock (USA) 64 76(4) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) defeated Jack Sock (USA) 64 76(4) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Alexander Zverev (GER) defeated Marin Cilic (CRO) 64 36 64 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Alexander Zverev (GER) defeated Marin Cilic (CRO) 64 36 64 Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) vs Alexander Zverev (GER) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) vs Alexander Zverev (GER) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) vs Alexander Zverev (GER) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) vs Alexander Zverev (GER) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Roger Federer (SUI) vs Alexander Zverev (GER) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.

2017 Nitto ATP FINALS Marin Cilic (CRO) vs Alexander Zverev (GER) Photo © Ray Giubilo This image may not be reproduced or sold to third parties.