Djokovic leads their previous meetings 24-11. They last met in the French Open Final in May. Djokovic won in 4 sets on clay.
They play for the world number 1 ranking today as well as the Tour Finals title. Murray looked pretty tired against Raonic. In the third set Murray twice served for the match but was immediately broken back

each time. Raonic isn’t known for his returning ability. He isn’t terrible on return obviously but isn’t on the same planet as Djokovic in that department.
Djokovic has had his problems this season but appears to be over them. He made a shaky start in his first match against Thiem and lost the opening set He has improved a great deal since then and lost just 2 games to Nishikori. The Japanese player had pushed Murray to 3 sets.
Murray has put so much into getting to number 1 and has run out of steam. He will give everything but I don’t see how he stops Djokovic taking his 5th consecutive WTF title and with it the number 1 ranking.
Hopefully Murray goes for it at the start of the opening set and we get to back Djokovic when he is a break behind.