David Ferrer of Spain, Andy Murray of Great Britain, Jo-Wilfried Tsonga of France, Roger Federer of Switzerland, Novak Djokovic of Serbia, Mardy Fish...
David Goffin of Belgium in action during a training session prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
View of the seats of the stadium prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
Rafael Nadal of Spain speaks to the media prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
General view of the court during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in London, England.
Roger Federer of Switzerland looks on in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Roger Federer of Switzerland in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Rafael Nadal of Spain in action as coach and uncle Toni Nadal watches on in a practice session during the Barclays ATP World Tour Finals - previews...
Rafael Nadal of Spain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Rafael Nadal of Spain looks on in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in London,...
Rafael Nadal of Spain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Rafael Nadal of Spain has a drink in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Rafael Nadal of Spain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Rafael Nadal of Spain has a drink as coach and uncle Toni Nadal gives advice in a practice session during the Barclays ATP World Tour Finals -...
Andy Murray of Great Britain has a drink after a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21,...
Andy Murray of Great Britain in action in a practice session as coach, Miles Maclagan looks on with Alex Corretja of Spain during the Barclays ATP...
Andy Murray of Great Britain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Andy Murray of Great Britain in action in a practice session as coach, Miles Maclagan looks on during the Barclays ATP World Tour Finals - previews...
Andy Murray of Great Britain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Andy Murray of Great Britain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Andy Murray of Great Britain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
Andy Murray of Great Britain looks on after a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009...
Andy Murray of Great Britain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
General view of the court during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in London, England.
General view of the court during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in London, England.
General view of the court during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in London, England.
Andy Murray of Great Britain in action in a practice session during the Barclays ATP World Tour Finals - previews at O2 Arena on November 21, 2009 in...
David Goffin of Belgium in action during a training session prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
David Goffin of Belgium in action during a training session prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
David Goffin of Belgium in action during a training session prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
David Goffin of Belgium in action during a training session prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
David Goffin of Belgium in action during a training session prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
David Goffin of Belgium in action during a training session prior to the the Nitto ATP World Tour Finals at O2 Arena, London on November 11, 2017.
Toni Nadal is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Alexander Zverev of Germany is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Carlos Moya is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Alexander Zverev of Germany is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Rafael Nadal of Spain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Rafael Nadal of Spain and Toni Nadal are pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November...
Rafael Nadal of Spain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Former ATP World No. 1 Juan Carlos Ferrero is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on...
Rafael Nadal of Spain and Alexander Zverev of Germany are pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena,...
Alexander Zverev of Germany is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Rafael Nadal of Spain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Alexander Zverev of Germany is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Alexander Zverev of Germany is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Alexander Zverev of Germany is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Alexander Zverev of Germany is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Rafael Nadal of Spain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Dominic Thiem of Austria is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Andy Murray of Great Britain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Rafael Nadal of Spain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Rafael Nadal of Spain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Andy Murray of Great Britain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Andy Murray of Great Britain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Andy Murray of Great Britain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Andy Murray of Great Britain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Andy Murray of Great Britain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Rafael Nadal of Spain is pictured during a training session prior to the Nitto ATP World Tour Finals at O2 Arena, London on November 10, 2017.
Alexander Zverev of Germany takes a break with Grigor Dimitrov of Bulgaria during a training session prior to the Nitto ATP World Tour Finals at O2...
