He withdrew from Basel too.
So his season is over.
...I don't want to raise false hopes, but I personally believe he will be competing in 2014 again, after all.
Firstly, his injury (it's the other wrist this time) sounds like being healed up by December.
Secondly, this season he won a whole 25% more in prize money than in 2012, and his ranking remained pretty much the same as well.
Of course, I can't tell about his family affairs etc., but in tennis regards things are looking quite well, actually.
So why would he retire?
I believe he will retire when his ranking drops too deep and the losing streaks are getting too long,
but not particularly when a season ends.
...A first glimmer of hope for him being willing to play in 2014 would be noticeable if he successfully appeals his Basel zero-pointer in front of the ATP.
His YE ranking points would increase then to a total of 890.
If he doesn't appeal they would remain 870, and that at least wouldn't be a good sign in respect of 2014, even though not an outright disqualifier either.
The appeal might be concluded around November, so I assume at the latest by December we will know.