The Brumbies had no fewer than 11 Wallabies in their starting line-up at the weekend, but coach Stephen Larkham will perhaps be most impressed with the contributions of those yet to wear gold.

Jarrad Butler has again stepped in and done a superb job in the absence of David Pocock at openside flanker, while Ita Vaea's return from serious illness has been incredible; the back-rower's latest star performance was topped off by a five-pointer in the weekend's 29-0 shutout of Queensland Reds.

Rookie lock Rory Arnold has also caught the eye, with ESPN correspondent Greg Growden revealing the two-metre giant has been mentioned in Rugby World Cup conversations; the Wallabies' lack of depth at lock could easily see Arnold board a plane to England later this year.

But it's the sole non-Wallaby in the Brumbies backline whose efforts have been somewhat overlooked in Australia; and in a week when he'll face off with one of the biggest names in Super Rugby, it's time we threw a little bit of praise Robbie Coleman's way.

Brumbies fullback Robbie Coleman is making a big impact in the No.15 jumper © Getty Images

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The diminutive Brumbies fullback has been excellent this year, playing well beyond his 1.79m and 84kg frame. Solid under the high ball, incisive on the counter-attack, the 24-year-old fits perfectly into a Brumbies back-three that features the raw power of Joe Tomane and the amazing footwork and speed of Henry Speight. And at a time when the modern-day back seems to be getting bigger and bigger, Coleman's performances in the No.15 jersey have served as a valuable reminder for one of rugby's great selling points: it's a game for all shapes and sizes.

A few weeks ago against the Chiefs in New Plymouth, Coleman took a bomb in heavy traffic, spun, stepped past a couple of defenders and put the Brumbies right back on the attack; it was a Test-quality play, one Coleman has made a bit of a habit of in 2015. He's made a number of breaks, beaten numerous defenders and, while he's yet to add to his five-pointer against the Reds in Round 1, his contributions have been no less important.

The build-up to the Brumbies' clash with the Waratahs in Sydney will feature a number of discussions about potential Wallabies showdowns: Nick Phipps v Nic White at half-back, Michael Hooper v David Pocock at No.7; Rob Horne v Joe Tomane on the wing; the list goes on.

But there's unlikely to be any mention of Israel Folau v Robbie Coleman. Folau, himself, won't be far from the spotlight and The Growden Report has already made mention of the Highlanders' success in limiting the code-hopper's impact last weekend. But that won't worry Coleman, nor Brumbies coach Larkham. The ACT side know the quality of the little bloke at the back. And Coleman's probably not interested in talk; as per the psyche the Brumbies have built since their inception, he just wants to get the job done.