Though the July 31 re-opener would be 13 months since he ruptured his Achilles tendon, the Nets are concerned about Durant’s rehab being interrupted dramatically in mid-March when he was up to 5-on-5 scrimmages with Nets bench players and player-developmental coaches. That was the last part of his Achilles rehab. But the pandemic prevented Durant from playing much basketball for nearly three months — let alone scrimmaging 5-on-5.