THEY'VE finally won in every mainland state, now Greater Western Sydney is looking to complete a first season sweep at its second home.

The second-placed Giants win over Port last weekend was their first in six= matches in South Australia.

That was the final state to fall to GWS, who broke their duck in WA earlier in the year at their seventh attempt.

The Giants host Richmond on Saturday in their third and final match of the season at Manuka Oval, their secondary home venue behind Sydney's Spotless Stadium.

GWS have played three matches a year in Canberra since their inaugural season in 2012, but have never managed to win more than two.

In 2016 in the nation's capital, they have beaten Geelong by 13 points in round two and smashed Port Adelaide by 86 two weeks later.

They are on track to register their second sellout crowd of the season in Canberra, following the Geelong game.

The Giants average attendances this season across both their home grounds, where they have won seven out of eight, are up to 12,593, from 10,786 last year.

"I think bit by bit awareness down there in Canberra at our second home is just growing every day, every week, every month, every year," Giants coach Leon Cameron said.

"Another sellout this week just confirms that. We had one last year, we're going to have two from three games this year. .

"We are really looking forward to getting down there, the atmosphere that it creates and playing some really good footy."

Richmond has won all five of their games against the Giants, with West Coast, North Melbourne and Collingwood the only other teams GWS has yet to beat.

The Giants play all those sides over the last five rounds, with the exception of Collingwood who beat them in Sydney earlier this month.

Cameron is wary of a Tigers side he believes will be fired up by a calamitous last-quarter performance last week against Hawthorn.

He defended Tigers star Dustin Martin against some recent criticism, pointing to the fact the player had posted over 30 possessions in his last six games.

"He can play with us this weekend if he's getting that much ball, I'll take it any day of the week," Cameron quipped.

"I think he's playing some really good footy. He's had a terrific year."