Grant Hill wasn't well on Saturday. He said he was but in the end he wanted to give more then his body was able to deliver.
The Suns have a few options for Tuesday if Grant isn't 100%. Going with Boris who plays well as a starter gives the Suns a big front line that would be a nightmare for the Spurs to matchup with. There are a handful of other options as well.
Or perhaps Half a Hill is still better then a Full French...