It was a surprising win to say the least lol. But it wasn’t just the free throws. The Celtics also had over 3 times the turnovers! More fouls, less 3’s made and the fact both of his PG’s nearly fouled out, and your PG had himself a near perfect game. That apparently is enough to overcome rebounding and assist differentials lol. Every time they rebounded the ball you probably stole it right back for a second opportunity.