A truncated tennis season draws to a close this week with the Nitto ATP Finals held at London's O2 Arena for the last ever time.

The iconic venue on the Greenwich Peninsula will be held behind closed doors, with Novak Djokovic and Rafael Nadal the headline acts, Stefanos Tsitsipas the defending champion and two debutants in Diego Schwartzman and Andrey Rublev.

The tournament is a sad farewell to The O2, with 2020 the final time it will be held there before it heads to Turin in 2021.

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It is easy to forget that bringing the tournament to The O2 in 2009 was deemed a big risk.

But close to three million fans made the journey to Greenwich during the first 11 years, making it one of the most successful tennis events in the world.

The ATP had hoped to go out with a bang, especially given it is also the 50th anniversary of the tournament, but instead coronavirus means no fans are allowed and all fireworks must be reserved for the TV coverage.

Their website says: "In line with existing UK Government guidance, the ATP currently plans to hold the 2020 Nitto ATP Finals behind closed doors due to the ongoing COVID-19 pandemic.

"Fans who have already purchased tickets or hospitality to the event through the tournament’s official ticketing partners will receive full refunds.

"AXS, the Official Ticketing Partner of the Nitto ATP Finals, and MATCH Hospitality, the official Corporate Hospitality Partner, will be in touch with all customers directly."

“The fans have played such an incredible part in the success of the Nitto ATP Finals over the years and there’s no question the capacity crowds will be deeply missed this year,” said Andrea Gaudenzi, ATP Chairman.

“Working within the guidelines issued by the UK Government is paramount as we look to prioritize the health and safety of the fans and everybody involved in the tournament in our efforts to deliver the event in the safest way possible.”

The prestigious season-ending championships sees the top eight singles players in the world qualify, and reigning Wimbledon and Australian Open champion Novak Djokovic is chasing another record.

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Having ensured he will equal Pete Sampras by finishing a season ranked world number one for the sixth time, Djokovic can match Roger Federer's mark by adding title number six at the ATP Finals.

He won four titles in a row in London from 2012 to 2015 but has fallen short on his last four visits. He nevertheless begins the event as the favourite and will want to end the year on a high after his heavy French Open final defeat.

This will also another attempt for Nadal to win the biggest title he's never won.

He has reached the final twice, most recently in 2013, while injury has prevented him from taking part on five occasions.

Dominic Thiem finally struck a grand slam blow for the 20-somethings by winning the US Open - albeit with Nadal and Roger Federer absent and Djokovic sabotaging himself.

The ATP Finals has been a more fruitful hunting ground, with Alexander Zverev beating Djokovic to win the title in 2018 and Tsitsipas battling past Thiem in a epic final 12 months ago. They will be among the favourites again, while Daniil Medvedev returned to form impressively by beating Zverev to win the Paris Masters last weekend.

There is only one British player competing this year - doubles specialist Joe Salisbury, who qualified with his American partner Rajeev Ram.

No British player has ever reached the doubles final at the event.