DeMar DeRozan shot close to a thousand shots for about two and a half hours on the eve of Game 4 on Sunday night, not leaving the arena until 1 AM.
The session placed heavy emphasis on scoring assertively and promptly.
DeRozan had a feeling LeBron James would be defending him.
"It's nothing new for me. You can ask anybody in this organization," DeRozan told cleveland.com. "There's not a night that I don't come back in the gym and try to work on something and get better on something. It's nothing new."
DeRozan had 32 points in the Toronto Raptors' 105-99 win over the Cleveland Cavaliers.