Horn (20-2-1) and Tszyu (15-0) are set to collide in a 10-round super welterweight bout on April 22 but a host venue is yet to be decided with Canberra joining a list of cities in the race.

The decision will hinge on which city can offer the most government support with Horn's promoter Dean Lonergan in discussions with a raft of state and territory bodies.

The ACT government is unlikely to be drawn into a bidding war but the city could be poised to strike pending venue availability.

Lonergan has met with ACT officials with Canberra Stadium viewed as the most logical venue should the fight come to the capital.

The Canberra Raiders will host South Sydney at the stadium on April 26 - four days after Horn and Tszyu fight - which will leave venue staff facing a short turnaround.

But Canberra Stadium officials are keen to secure more sporting content outside the realms of rugby league and rugby union.

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The crowd figure both camps are expecting has ruled out the AIS Arena and National Convention Centre as potential hosts, leaving the outdoor stadium as the only remaining option.

"Canberra would very much be in the hunt, it's just a case of getting the right circumstances," Lonergan said.

"One of the things we bring to the table in a big way, is we're going to get a huge amount of media coming from Sydney about this.

"If we were to go down to Canberra, I would see thousands of people descending upon the place from out of town because it is just such a unique event.

"Canberra could be in for a financial boon of visitors if they secure the fight, because it's only a three-hour drive from Sydney, and that's the key.

"You need something outdoors. One of the problems with Canberra is the weather, so going outdoors is difficult. The weather is so variable.

"Canberra is on the radar because we've had interest from down there.

"It just makes sense when you've got enormous amounts of media and fans in Sydney that would come across the territory line to go to the ACT."

D&L Events promoter Lonergan had a meeting with Queensland state government officials on Monday. Townsville is in the mix while Brisbane looms as Horn's preferred destination for the bout.

Lonergan has sent a proposal to the Western Australian state government with an eye on the 15,500-seat Perth Arena, while conversations are ongoing with officials in Victoria and NSW.