Good thing to hang out at Vamos David (click link above) to get live streams. We got lucky with another cool visitor giving us the live stream to the Nalby-Gaudio match:
Gaudio just won the first set 6-3. There were 6 breaks of serve in the first set. From the little I've been able to see, David's return of serve wasn't too sharp and Gaudio had repeated problems on his ball toss. It may be a little windy, but I guess the real problem is intense heat.