Test your knowledge on the season-ending ATP Finals at The O2 in London and don't forget to catch all the action on Sky Sports.
As we gear up for the end of the tennis year, we've put together a range of hard-hitting questions to test your knowledge on the ATP Finals - which is live on Sky Sports Arena.
How well do you know your game?
Will you hammer down another ace or will you serve up a series of double faults?
Stop soft-balling us and show us if you can hit the sweet spot with a perfect 15 out of 15.
Take our quiz below and see if you can end the year as world No 1...
We have every major tennis event covered from all angles via our website skysports.com/tennis. On the move? Head to our app for mobile devices and iPad, or follow our Twitter account @SkySportsTennis to join in the conversation.
We will have coverage of the ATP Finals at London's O2 in November with every match live on Sky Sports. See TV listings HERE.