Grant Williams could present Celtics with a good problem to have this offseason

Grant Williams has improved so much this season, he presents the Celtics with something of a problem whenever this playoff run ends.

Williams demands your attention. Many Celtics fans who gave up on him last year perked up when he became one of the league’s best 3-point shooters this season. Those who didn’t buy in immediately were forced to do so when he shut down Kevin Durant in the first round. Now he’s doing things like this to Giannis Antetokounmpo.

All the while, Williams has improved as a 3-point shooter so thoroughly, that opposing teams will need to reshuffle their defensive priorities. Jayson Tatum and Jaylen Brown can (and often will) beat you, and Tatum in particular needs to be…