While fans may be sad that the last season of the decade is over, they can look forward to a new tournament christening the next 10 years: the ATP Cup. The team event will begin just three days into 2020 on January 3.

Some of the best of the best are competing for their country, including Novak Djokovic and Rafael Nadal.

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Ties will feature two singles and one doubles match (doubles will be no-ad scoring and a tiebreak instead of a third set) and every country will play three ties in the group stages.

From the location to the number of teams to the prize money, it's time to get familiar with the ATP Cup.