That draw is
It's often not balanced, but of each pairing, Murray didn't just get the trickier match, the difference between each is huge right now.
Raonic will either withdraw injured, or he'll play, but tentatively. Monfils could be a tough opponent, but it's his first trip to the WTFs, so he may be distracted, and the showbiz feel might encourage him into his bad old ways. He did withdraw from Paris with an injury, but I suspect it was a tactical decision to be healthy for WTF, and I expect him to at least be healthy. Thiem is now running on fumes, and will also be so pleased to reach the finals that an experience player should be able to take advantage.
Djokovic isn't playing well, but not one of his opponents have ever beaten him. Even in a slump, he maintains a pychological advantage, and he'll have a decent chance of reaching the semis.
Meanwhile, Cilic is in form, and feeling confident, coached by Bjorkman. That could give him an edge, assuming it doesn't have the same impact as when Murray plays one of Valverdu's charges! If Stan decides to have one big last push at the end of the year, he could beat anyone, and Kei is always tricky if fit. They all know they are capable of beating Murray, and will give it a good go.