That was one of the best tennis rallies I've seen in a long, long time. Venus sends Serena running to every corner of the court. That rally had to end somewhere and it ends as Serena shanks a forehand. There's stress and it's palpable. From both ends. 15-30.
That was an epic rally. An epic rally. It stays down the line - and Venus starts taking it across the court. Again, Serena tries that doublehanded backhand and sends it wide - almost a carbon copy of the previous shot.