Harden practices fully with Sixers, status for preseason opener still uncertain amid trade demand

Harden has participated fully in recent practices despite his trade demand.
The Sixers are focused on implementing new coach Nick Nurse's system and culture.
It's unclear if Harden will play in the preseason opener against the Celtics.
The team is embracing Nurse's more free-flowing offense with increased involvement for all players.
There's a positive vibe at camp despite the Harden drama, with players noting the altitude benefit and interacting with students and coaches.