As the Spurs evolve into a legit NBA contender, they will be constantly asked to pass tests along the way. Most of those this season have been met by Wemby & Co, including successes vs. the champion Thunder...but not all of them. To wit: San Antonio has only won three of seven since the high of the Christmas win over OKC, and now must deal with the ever-dangerous Celtics, in a rare home dog role tonight. Even minus Jayson Tatum, Boston has remained a top contender in the East as Jaylen Brown (29.6 ppg) has elevated his game to near-MVP levels, and Payton Pritchard (off of 28 points in a win vs. Toronto) continues as one of the NBA's best sixth men. Play Celtics