 George Wallace is back with us. What's going on? Well, still talking tennis in the quarterfinals. American Taylor Fritz now, Mark, has some work to do after dropping the third set to Lorenzo Mazzetti today. And now they're in the fourth set. This after Fritz won the first set, 6-3, but then 7-6, 6-2. Now up 2-1, though, in the fourth, trying to advance. He's 0-3 in Grand Slam quarterfinals. Meanwhile, ninth seed Alex Domenoarch withdraws with a hip injury. So Novak Djokovic, the seven-time champion, advancing defensively.