Is Keldon out? I thought he was questionable? That would imply that he didn't necessarily test positive and has just been in isolation for precautions. Dunno.
Anyway, I'd expect Murray on Irving and Walker on Harden, though with obviously a lot of switching. I also expect the Spurs to play big as much as possible, and with the Nets missing PF depth, I think it could work out in SA's favor.