The 35-year-old Haas unleashes his variety in a 6-3, 6-4 win.
Davis upsets Azarenka, 6-0, 7-6 (2), Radwanska, Jankovic, Errani and Wozniacki all advance.
"This problem that I have is something that is not so easy to get rid of," Azarenka said.
The 20-year-old American upset an in-pain, error-prone Vika.
"When I'm saying that I won a Grand Slam it's still strange for me," says the third-ranked Swiss.
American wild cards and qualifiers met with mixed results in Indian Wells.
The Bryan brothers answered John McEnroe's barbs with a doubles demolition.
A look around the grounds on the first Friday at the BNP Paribas Open.
Reviewing the new Stadium 2, and the return of Fedrinka, at Indian Wells.