Shame for Brian, he could have won. But then again I doubt he has a very high level of fitness to win third sets.
He doesn't have a coach right now, he's just traveling around playing. He can get away with this a bit because he's very talented. But if he can stay healthy and has the money to hire a coach and fitness trainer, he can fulfill a lot of his original potential.
His comeback won't really be complete until he routines Djokovic again