Sydney - The Super 14 playoff battle goes down to the wire in this weekend's final round of matches, with seven teams still in the hunt for the four available places.
The front-running Bulls and second-place Chiefs are in the box seat to host the playoff semi-finals - but one of the tightest races in memory means almost anything could happen.
New Zealand's Chiefs can secure just their second playoff appearance ever by taking one point from their clash with the Brumbies on Friday, so even a bonus point would send them into the playoffs next week.
But if the Brumbies can deny the Chiefs a point and get their own four-try bonus point win, they will book their first playoff berth since 2004 - and the Australians have won on their last four visits to Hamilton.
"Probably the best thing about it is getting your game out there, doing the best you can and then sit back and see what everyone does," said Chiefs captain Mils Muliaina, whose team can ensure a home semi-final with a win.
"But we have to do our job first. It would be nice to have a home semi. We clearly know we could still miss out if we don't do things right on Friday."
South Africa's Bulls meanwhile can lock up a home semi-final if they can beat the sixth-placed Sharks in Durban on Saturday.
The win would give them a franchise record 10 wins in one season, while the Sharks - who have lost three of their last four games - have beaten the Bulls just twice at home in the Super Rugby round robin since 2001.
The Hurricanes and Crusaders, in third and fourth place, will book their own playoff spots with wins on Saturday.
The Hurricanes travel to Brisbane to take on the second-from-bottom Reds, while the Crusaders have a feisty New Zealand derby with the ninth-placed Blues.
The Hurricanes, who relinquished the competition lead with last week's 16-8 loss to the Chiefs, must beat a Reds side bolstered by the return of Wallabies James Horwill and Berrick Barnes.
Wellington, chasing a fifth semi-final appearance in seven years, have won on two of their last three visits to Brisbane and have won six of the last seven between the two teams.
The seven-time champion Crusaders meanwhile have worked their way into playoff contention winning six of their last eight games but face the Blues - the only team in Super Rugby with a winning record against them.
Like the Brumbies and Sharks, the Waratahs also can still squeeze into the playoffs if the right results fall their way - but they need a bonus point win against the Lions in Johannesburg on Friday.
The seventh-placed Waratahs have just four bonus points this campaign and will need to unshackle their defensive mindset to get the four tries needed to have even a remote chance for the playoffs.
"All we can do is go out there with a focus on winning the game," coach Chris Hickey said. "That's all we can control, and the rest will take care of itself."
In this weekend's remaining games, Australia's Force are at home to New Zealand's Highlanders and the Cheetahs host the Stormers in Bloemfontein.