More than 250,000 people have attended the O2 Arena in each of the two previous years that the finals have been held in London.
The crowds come —
More than 250,000 people have attended the O2 Arena in each of the two previous years that the finals have been held in London.
Barclays bank is the tournament's main sponsor, and Lacoste is another key partner. India's Rohan Bopanna smashes a return while doubles partner Aisam-ul-Haq Qureshi of Pakistan looks on.
Banking on it —
Barclays bank is the tournament's main sponsor, and Lacoste is another key partner. India's Rohan Bopanna smashes a return while doubles partner Aisam-ul-Haq Qureshi of Pakistan looks on.
The players come into the stadium -- which usually stages concerts -- from their own personal locker rooms in a cloud of dry ice.
Rock star treatment —
The players come into the stadium -- which usually stages concerts -- from their own personal locker rooms in a cloud of dry ice.
The event provides good exposure for sponsors such as FedEx, which has naming rights for the players' benches. World No. 2 Rafael Nadal towels himself dry as he changes his shirt during his opening win against Mardy Fish.
A piece of flesh? —
The event provides good exposure for sponsors such as FedEx, which has naming rights for the players' benches. World No. 2 Rafael Nadal towels himself dry as he changes his shirt during his opening win against Mardy Fish.
Swiss superstar Roger Federer is seeking a record sixth title at the season-ending men's championships.
History maker —
Swiss superstar Roger Federer is seeking a record sixth title at the season-ending men's championships.
The tournament has attracted celebrities including football star Thierry Henry, seen here with his friend Federer's wife Mirka. Singer Peter Gabriel, Britain's Princess Beatrice and boxer David Haye have also been spotted in the crowd along with a slew of Premier League footballers.
Stars on parade —
The tournament has attracted celebrities including football star Thierry Henry, seen here with his friend Federer's wife Mirka. Singer Peter Gabriel, Britain's Princess Beatrice and boxer David Haye have also been spotted in the crowd along with a slew of Premier League footballers.
French sixth seed Jo-Wilfried Tsonga has been one of the success stories of this month's tournament, qualifying for the semifinals at the expense of Nadal.
Nadal's nemesis —
French sixth seed Jo-Wilfried Tsonga has been one of the success stories of this month's tournament, qualifying for the semifinals at the expense of Nadal.
ATP World Tour executive chairman and president Adam Helfant, left, presents top-ranked Novak Djokovic with the player of the year trophy this week -- and a bottle of champagne provided by sponsor Moet & Chandon.
Champagne super-Novak —
ATP World Tour executive chairman and president Adam Helfant, left, presents top-ranked Novak Djokovic with the player of the year trophy this week -- and a bottle of champagne provided by sponsor Moet & Chandon.
Luxury watchmaker Rolex is another of the tournament's key sponsors, and provides the time-keeping. Here Fish waits during his match with Nadal.
The time is now —
Luxury watchmaker Rolex is another of the tournament's key sponsors, and provides the time-keeping. Here Fish waits during his match with Nadal.
World No. 3 Andy Murray was a forlorn figure as he announced that he had to pull out after only one match due to a groin injury. The withdrawal of the tournament's only British player was a blow for sponsors and organizers alike.
Home hope pulls out —
World No. 3 Andy Murray was a forlorn figure as he announced that he had to pull out after only one match due to a groin injury. The withdrawal of the tournament's only British player was a blow for sponsors and organizers alike.
The Bryan brothers Mike, left, and Bob are top seeds in the doubles event. Here the Americans celebrate a group-stage victory with their trademark chest bump.
Bumping buddies —
The Bryan brothers Mike, left, and Bob are top seeds in the doubles event. Here the Americans celebrate a group-stage victory with their trademark chest bump.
Brad Drewett has been the event's tournament director for more than a decade.
Tournament chief —
Brad Drewett has been the event's tournament director for more than a decade.
The Australian took the finals back to China in 2005. Here he is pictured with Federer and Minhang district director Chen Jing ahead of the 2006 Masters Cup in Shanghai.
Shanghai to London —
The Australian took the finals back to China in 2005. Here he is pictured with Federer and Minhang district director Chen Jing ahead of the 2006 Masters Cup in Shanghai.