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The world No. 1 has put in a lot of effort representing his country. 

See how much you know about the South Floridian tournament.

Since the 1970s, the tours have been handing out year-end honors. 

Test your knowledge of the recent ATP Finals champion.

Despite only playing a few tournaments, Barty secured the 2020 year-end No. 1 ranking.

This year will be the final time the ATP Finals will take place in London.

Test your knowledge of who has been year-end No. 1 for both the WTA and ATP.

The German announced her retirement after 15 years on the WTA tour.

The Roland Garros champion's short career has been nothing short of fascinating.

With the French Open in full swing, see what you know about the Major's unique surface.

Test your knowledge of the No. 1 seed's accomplishments in Paris.

The Spaniard's memorable journey through the Masters 1000 tournament has lasted 15 years.

Test your knowledge of the unprecedented changes to this year's tournament.

The twins have officially retired, ending their careers as the greatest team of all time.