"So on the contrary, Dolohov, this is just between us," Harry replied, dangerously. "It’s been a lot of years since we last drew wands on each other, you and I ... and I have been waiting since that night to fight you again, you know. Few of uncle Tom’s people are worthy of being killed by wizards of our skill. Potent magic doesn’t mean you can duel with honour. But you clearly can ... you don’t beat a legend like Filius Flitwick if you don’t know how to handle a wand.