World number one Andy Murray insisted Sunday that Novak Djokovic will remain his biggest threat in 2017, as the pair prepare for a potential first clash of the season in Doha this week.

World number two Novak Djokovic confirms that he has split from his coach Boris Becker after three years working together

Andy Murray could round off his sensational year which has seen him finish as men's tennis world number one and win both Wimbledon and the Olympic title with a historic third BBC Sports Personality of the Year award.

Andy Murray and Novak Djokovic will slug it out for the world number one ranking in a high-stakes final at the ATP Tour Finals after completing their contrasting paths to the dramatic showdown.

Andy Murray remains on course for a dramatic showdown with Novak Djokovic as the world number one staged a superb fightback to defeat Milos Raonic 5-7, 7-6 (7/5), 7-6 (11/9) in the semifinals of the ATP Tour Finals.

Novak Djokovic booked his place in the semifinals of the ATP Tour Finals with an emotional 7-6 (8/6), 7-6 (7/5) victory over Milos Raonic on Tuesday.

Novak Djokovic books his place in the semi-finals of the ATP Tour Finals with an emotional 7-6 (8/6), 7-6 (7/5) victory over Milos Raonic.

Marin Cilic dumps a struggling Novak Djokovic out of the Paris Masters quarter-finals to pave the way for Andy Murray to become the new world number one.

Novak Djokovic's problems come to an explosive head at the Shanghai Masters and the Serb now faces being knocked off world number one if he can't find a quick solution.

Australia's Nick Kyrgios is booed off court in a tanking row at the Shanghai Masters as Rafael Nadal crashes out and Andy Murray motors into round three.

Novak Djokovic scraps his way into the U.S. Open final for a seventh time with a confounding 6-3 6-2 3-6 6-2 win over enigmatic Frenchman Gael Monfils.

Novak Djokovic's path to a 10th successive US Open semi-final has been a strange one, but the world number one isn't complaining.

Gael Monfils is back in a Grand Slam semi-final after an eight-year wait after pummelling fellow Frenchman Lucas Pouille 6-4, 6-3, 6-3 to reach the US Open last four.

Novak Djokovic opens defence of his U.S. Open title with a laboured 6-3 5-7 6-2 6-1 win over Poland's Jerzy Janowicz that brings new concerns about the world number one's fitness.

Novak Djokovic and Rafael Nadal get their US Open campaigns under way Monday in the shadow of Arthur Ashe Stadium's spectacular $150 million retractable roof and alongside rock music legend Phil Collins.

World number one Novak Djokovic is reduced to tears after suffering a shock first round 7-6(4) 7-6(2) loss to Argentina's Juan Martin del Potro in the men's Olympic tennis tournament.

Four-time gold medallist Venus Williams, suffering with a virus, slumps to her first ever opening round loss at an Olympic Games

Tennis world number one Novak Djokovic says he is happy that Russia avoided a blanket Olympic Games ban but admits the scandal was a dark episode for sport.

Novak Djokovic, Andy Murray, Rafael Nadal and Serena Williams will display their Grand Slam talents in Rio, but with serious questions being asked over tennis's place in the Olympics after a host of high-profile pull-outs.

World number one Novak Djokovic continues his dominance of Kei Nishikori with a 6-3 7-5 victory in the final of the Rogers Cup in Toronto on Sunday.