Knee issue knocks Nadal out of Swiss Indoors.
The Russian is the second to qualify. Six spots are yet to be claimed for the Nov. 11-17 event.
The Swiss claims his 94th career title with a sublime performance
This could be the last wild card that the Russian needs for a while.
Three teams qualified for the ATP World Tour Finals on Friday in Shanghai, leaving only two remaining spots open.
The Austrian reaches the elite event for the second consecutive year.
The Argentine fell and landed on his left wrist on Friday night in Shanghai.
