Just four days after helping the Brumbies to a historic win over the British and Irish Lions, Coleman played a leading role as the Whites beat Royals 29-14 at Phillip Oval in brutally cold conditions.

It was the Whites' first win since May 18 and keeps them right in the race for a spot in the top four.

More important, it will restore confidence after losing four games by three points or less this season.

Coleman's double helped seal the result and he crossed for his second try with the Whites leading by just one point with 20 minutes remaining.

Playing at a cold and wet Phillip Oval is a long way from the euphoria and excitement that engulfed Canberra Stadium after the Brumbies' 14-12 win over the Lions on Tuesday night.

But the 22-year-old's try-scoring form was perfectly timed, with Brumbies coach Jake White watching on and the Super Rugby finals looming next month.

''The first 10 minutes I just felt really lethargic out there, I don't know what it was,'' Coleman said.

''It hit me really early. I sparked up a bit in the second half, but playing 80 minutes will do me the world of good.

''It's a different game to get yourself up for, but it was an important game for the Whites and it's good to get back in the winning circle.''

Coleman was one of a handful of Brumbies sprinkled through Canberra's premier division as they try to get more game time and impress White to earn a spot for the Super Rugby playoffs.

After spending most of the season on the Brumbies' bench, Coleman relished the opportunity for more game time and steered the Whites to victory.

Royals were dealt a massive blow when their star fullback, Ben Johnston, was knocked out in the first half and they trailed 15-14 at the break.

Both teams had chances to score in the second half, but the game was riddled with handling errors and scrums as the slow play ruined any hope of gaining momentum.

Coleman broke the standoff with a try after the break and then Whites captain Dan Penca put the result beyond doubt when he scored in the corner late in the game.

''An indifferent month is being kind to us. That was a test of character,'' Whites coach Adam Fahey said.

''When you lose the games we've lost, it comes down to character, hard work and commitment.

''Of course, the confidence took a hit. Players start to doubt what they're doing, but hopefully this gets us on track.''

Royals coach Russell Ingram was left lamenting an injury toll that kept eight first-grade players on the sideline.