The unexpected move by Thiem has left more questions than answers.
The world No.5 is under fire over his attitude on the court.
The world No.4 is hoping to match and even break the records set by his new coach.
Will the reign of Rafael Nadal and Co at grand slams finally come to an end this year?
The dominance of the Big Three in grand slams will continue next year, according to Ivan Ljubicic.
Only two players have won the award since 2004.
Daily round-up from the O2 Arena in London for the final day of the Nitto ATP Finals
The Greek is the first ever player from his country to win the season-ending tournament.
Could next year see a huge change in men's tennis?
The 26-year-old has achieved a duo of personal and national records at the London event.
Daily round-up for Day 5 at the Nitto ATP Finals at the O2 Arena in London
The world No.5 explains why the key to his latest match was keeping it short, but not necessarily winning.
The 23-year-old ends his breakthrough season on the ATP Tour with another milestone in his career.
Daily round-up by Ubaldo Scanagatta from the O2 Arena in London
For the second time in his career, Thiem has battled back from a set down to upset the former world No.1.
Novak Djokovic plays Dominic Thiem for a commanding lead in the Bjorn Born Group, while Roger Federer faces Matteo Berrettini to stay out of last place.
A video recap from the O2 Arena in London. Djokovic loses just three games to Berrettini but it's Thiem's straight-set win to Federer that makes the...
The Austrian has continued his unbeaten record against the world No.3 this year.
The Austrian speaks out about his 2019 performances and outlines what areas of his game he would like to improve.
Before this year the Austrian had not won a title on home soil. Now he has two.