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News of Robert Farah's failed drug test shook up the tennis world on Tuesday. 

His efforts were rewarded with a winner, and eventual 2-1 victory over Poland.

From iguanas to cats, this decade saw its fair share of unexpected on-court appearances. 

Tsitsipas and Thiem will each seek their biggest career title at the ATP Finals on Sunday.

The Brit pulled out all his tricks in this Vienna doubles final. 

Federer and Djokovic will meet in a winner-take-all clash after Tuesday's mixed results.

The top eight teams are set to do battle at the season-ending championships.

Joe Salisbury hit a shot-of-the-year contender en route to the Vienna doubles title. 

The WTA regular season has come to an end, while the men have a handful of events left.

The 2019 season is winding down with plenty of action on both tours.

A surprise team triumphs at the China Open, while other pairs add to their title haul.

The teens landed in the second week, plus more from the tournament.

Top teams on the ATP and WTA tours are set to battle at the last major of the year.

Unexpected teams take the final big tuneup before the US Open.