It seems like Delpo makes Roger get mad at umpires
It's like Shanghai when DelPo got mad at the umpire because he thought the umpire was cowed by Roger saying 1 word to him. At the changeover DelPo said something like, "He says one word to you and you're scared!" Nice to see how badly they BOTH want to win. I think it still amazes people that with as much as Roger has already won in his career - he still wants more.