Daniel Hudson yielded two hits and struck out four over five scoreless innings on Wednesday against the Brewers. (AP)

SCOTTSDALE, Ariz. -- In a rematch of last year's National League Division Series, the Brewers and D-backs were stymied by one another in front of a sellout crowd at Salt River Fields, as the clubs played to a 0-0 tie that was called after nine innings.

The starters -- Yovani Gallardo for the Brewers and Daniel Hudson for the D-backs -- set the tone from the outset with dominant outings.

Hudson allowed just two hits and one walk while fanning four.

Hudson, who figures to start the second game of the year for the D-backs, has allowed two runs in his last three starts, a span of 12 innings.

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Meanwhile, Gallardo, who is expected to be Milwaukee's Opening Day starter, scattered seven hits and one walk while striking out three in 4 2/3 innings.

Most of the hits against Gallardo were grounders through the infield, and he called his outing a step forward from five days earlier against the Royals. That day, he surrendered four runs and five hits in three innings while struggling with his tempo.

On Wednesday, he focused on his changeup, a pitch Gallardo has struggled to master in his career. He threw more than 10 of them, all against Arizona's left-handed hitters.

Just one percent of Gallardo's regular-season pitches in 2011 were changeups, according to FanGraphs.com. That figure should rise in 2012.

"That's the goal," Gallardo said. "That's what I'm shooting for. I was able to throw it today quite a bit. ... It's a matter of having confidence in it. I'm always still working on it. It's a pitch that I've had trouble throwing, but it's starting to feel comfortable, so that's a good sign. I'm starting to command it a lot better, which is also a plus."

Up next: The D-backs will have their second and final off-day of the spring Thursday. Arizona returns to action Friday night against the White Sox at Camelback Ranch. Joe Saunders will get the start, while most of the regular players -- including Justin Upton, Miguel Montero and Paul Goldschmidt -- are scheduled to make the trip across town.