It didn’t end up mattering in a blowout, but it’s something worth monitoring going forward. Nick Nurse pretty much forced the Knicks to play Ariel Hukporti during their 137-98 bludgeoning of the 76ers in Game 1 Monday night at Madison Square Garden. It’s something that could actually play a factor in a closer game if Mitchell Robinson’s free-throw woes continue. Robinson checked in for Karl-Anthony Towns earlier than usual in the first quarter, since Towns picked up two early fouls. Mitchell Robinson missed all four of his free throws for the Knicks. JASON SZENES FOR THE NEW YORK POST And, knowing the Knicks didn’t want to put Towns back in the game, Nurse opted for Hack-a-Robinson. Robinson went 0-for-4 from the line, pretty much the only thing that temporarily slowed down the Knicks offense. With no other option, coach Mike Brown took him out for Hukporti. Hack-a-Robinson is something the Hawks at times utilized in the first round to limit Robinson’s impact and slow down the Knicks offense.…