Originally Posted by Goldenoldie
In my opinion:-
The match was played, even though under different scoring.
Therefore I would treat it the same as a win by retirement, i.e winner counts but the SR does not.
So the winners are Boarder35m and Hotzenplotz on SR1 Shootout (Correct winner)
It's tough, but so are retirements.
(There could be a similar situation if a slam had to go from 5 sets to 3 sets for example)
I think that's fair - I also think that should be codified somewhere - as you say there is the potential for it to happen in slams, although highly rarely.