Tennis: Djokovic avoids Thiem upset

Djokovic's 122-week reign at the top was ended by Andy Murray last weekend

Novak Djokovic survived a scare at the start of his bid to regain the world number one ranking as the Serb battled back for a 6-7 (10/12), 6-0, 6-2 victory over Austria's Dominic Thiem at the ATP Tour Finals on Sunday.
Djokovic's 122-week reign at the top was ended by Andy Murray last weekend.
However, he can climb back into pole position by the end of the tournament if he lifts the Tour Finals title for a fifth successive year while winning at least two of his group stage matches.
The 29-year-old remains on track to achieve that target despite a shaky first set in the opening match of the prestigious season-ending tournament at London's O2 Arena.
And amid all the questions about Djokovic's decline, he can still clinch the season-ending number one spot for a third consecutive year and equal Roger Federer's record of six Tour Finals titles by the end of next week.
"Dominic started very well and we played on a very high level from the first point," Djokovic said.
"He had a very high serve percentage and was the tougher player in the key moments of the tie-break.
"I definitely did not want to let him get off to a good start in the second set."