That made Tonks chuckle. "Ah, so that's why his hair's green. I was wondering..." She was clearly amused about the whole thing.

"It's good to be able to defend yourself well. Sometimes Remus and I still go out and duel, just to keep each other sharp. If you managed to score on him, I'm impressed. He's very crafty."

Though Remus had been testing Draco more as a student instead of another wizard.