Mahut is injured - having an MRI last night - so may well pull out, with both the O2 and (I suspect more crucially) the Davis Cup finals still on the radar.
After Nadal's withdrawal the match has been put on centre court so looks like he'll be giving it a go at least.
With Kontinen & Peers dropping a total of 2500 points from Paris and the O2 last year and losing today, Kubot & Melo are already confirmed as taking over as WR 1 and WR 2 post Paris ( I believe on the same points as each other and I haven't looked into who might be ahead on tiebreakers ).
Such a shame Kyle couldn't hold it together in that match - Sock is about to win the title with a double break lead in the third against the qualifier Krajinovic! If he wins, he'll also go 8th in the world and qualify for the O2. The margins in this sport can be so incredibly fine sometimes.
Jack Sock wins the final 5-7 6-4 6-1 and indeed qualifies for the O2. 'Just' WR 9 ( Stan is still WR 7 ) but still significantly betters his previous CH 14.
Jack Sock winning means the European run of consecutive Masters and GS winners stops at 107.
Jack Sock winning a masters is a complete sporting mystery, on the same level as the Shergar saga.
Not really a mystery when you look at the field, particularly when Rafa decided to give a walkover as soon as he was sure of clinching year end number one. I hope to see some major health improvements amongst the top players in the next couple of months because on the whole 2017 has been a joke at the top end of the game and not really pleasant to watch.