It's such a strange year because of the extreme parity...
The only team I think the Spurs can't beat is a healthy Golden State. Denver has been impressive, but they're not unbeatable. Houston, Portland, OKC, and the Lakers all have flaws and are definitely beatable. I went into this season thinking of it as a year for DeRozan to get acclimated and for Derrick White and Davis Bertans to get minutes and improve. It seems like that is happening. Considering that a month ago quite a few people were calling for the Spurs to tank the entire season, I'd say they've already achieved success.