Obviously, the confrontation at that time made Pierce have a strong resistance to James. After he joined the Wizards, he also carried out this idea.
At the Wizards' Media Day, Gottat revealed that Pierce had told him "Don't wear lebron james's sneakers for training".
This is not surprising. Pierce is a very good player. He will talk nonsense and do such a thing. His charm will help him achieve this goal. Of course, many big-name stars have their own signature shoes and don't wear other people's shoes. Players without signature shoes have little influence on themselves.
Now that Pierce has joined the Clippers, he certainly won't wear the latest LeBron 13PE sneakers.