Federer is searching for his first title of the year and is aiming to get back on track with a fourth crown in the California desert.

"Every first round you play at a big tournament is always a bit of pressure if you're number one seed," stated the 27-year-old.

"I could have taken more chances and won more easily but I'm happy with the way it went."

Roddick threw down his racquet and hit a ball out of the stadium as he went down to German Haas.

The pair were evenly matched, Haas had 30 winners to Roddick's 26 and both made 26 unforced errors, but Haas converted both his break chances.

"When I broke him, I really played some great points, backhand and forehand passing shots and forehand lobs, and that was really the only difference," conceded Haas.

Despite his on-court outbursts, Roddick was able to swallow his defeat after winning titles in San Jose and Dubai.

"It's a lot easier sitting here after this loss today having put together the body of work I have over the last month," he said.

"It's probably easier to take and probably affects your confidence a lot less."