The Force get the win by a comfortable margin in Super Rugby.
The Western Force set up a cut-throat last round match-up with the Brumbies following a 30-20 win over the Queensland Reds at Perth Oval on Saturday evening.
The Force raced to a 17-3 lead, but the Reds wanted to spoil their party and had levelled scores at 20-20 with just over 10 minutes remaining.
But the Force then found something and hooker Nathan Charles scored the match-winning try in the 73rd minute, moving the Force to 40 points and equal with the Brumbies in the overall standings.
The winner of Friday night’s clash in Canberra between the Brumbies and Force will now play finals in 2014.