The Western Force's finals hopes are on life support after they suffered a fighting 24-14 Super Rugby Pacific loss to the Chiefs in Perth.

In front of 5394 fans at HBF Park on Saturday night, the Force levelled the scores at 14-14 in the 49th minute to threaten an upset.

But the Chiefs' class shone brightly from that point on with the visitors scoring the next try and then holding on grimly when Ollie Norris received a yellow card in the 64th minute.

The result leaves the Force (four points) in second-last spot on the table with just one win to show from six games.

The Force's inability to pick up any losing bonus points also hurt, with just eight more games remaining for them to mount an unlikely finals assault.

The Chiefs rose to fifth and improved their record to 4-2.

Former NRL star Zac Lomax warmed up with the Force in a sign his Super Rugby debut could be just one or two weeks away.

The rain held off for most of Saturday's match despite Cyclone Narelle having made landfall in Western Australia.

The Force put up a huge defensive effort in the first 20 minutes, but when a crack finally did appear Chiefs flanker Luke Jacobson barged through it to score the opener in the 22nd minute.

The Chiefs threatened to score a second try shortly after following a fast break, only for Force scrumhalf Henry Robertson to win a vital penalty at the breakdown.

That momentum shift - which included a line-out steal - proved crucial.

When Ben Donaldson launched a high ball, Force centre George Bridge ran hard to take the grab and set off.

A slice of luck fell Bridge's way when he was tackled, with the ball bobbling backwards to teammate Max Burey who scored a runaway try to level the scores.

But there were still plenty of worrying signs for the Force with the gaps in defence opening wider and wider.

The Chiefs took full advantage in the 39th minute when flyhalf Josh Jacomb rounded Bridge before sprinting 30m to the line, giving the visitors a 14-7 lead.

The scores were back level in the 49th minute when Force skipper Jeremy Williams took the ball from a ruck and moved it forward a few centimetres to score one of his easier tries. 

A rolling maul from the Chiefs sent Samisoni Taukei'aho over in the 58th minute and a penalty to Damian McKenzie in the 79th minute sealed the win, with the Chiefs' ability to hold firm when down to 14 men from the 64th to 74th minute proving crucial in the triumph.

Chiefs 24 (Tries: Jacobson, Jacomb, Taukei'aho; Cons: McKenzie 3; Pens: McKenzie) def Western Force 14 (Tries: Burey, Williams; Cons: Donaldson 2)

Teams

Western Force: 15 Max Burey, 14 Darby Lancaster, 13 George Bridge, 12 Kurtley Beale, 11 Bayley Kuenzle, 10 Ben Donaldson, 9 Henry Robertson, 8 Vaiolini Ekuasi, 7 Carlo Tizzano, 6 Nick Champion de Crespigny, 5 Darcy Swain, 4 Jeremy Williams (captain), 3 Harry Johnson-Holmes, 2 Brandon Paenga-Amosa, 1 Tom Robertson
Replacements: 16 Leonel Oviedo, 17 Sef Fa’agase, 18 Misinale Epenisa, 19 Lopeti Faifua, 20 Will Harris, 21 Nathan Hastie, 22 Hamish Stewart, 23 Divad Palu

Chiefs: 15 Damian McKenzie, 14 Emoni Narawa, 13 Leroy Carter, 12 Etene Nanai-Seturo, 11 Josh Jacomb, 10 Xavier Roe, 9 Simon Parker, 8 Quinn Tuapea, 7 Luke Jacobson (captain), 6 Samipeni Finau, 5 Seuseu Naitoa Ah Kuoi, 4 Josh Lord, 3 George Dyer, 2 Brodie McAlister, 1 Jared Proffit
Replacements: 16 Samisoni Taukei’aho, 17 Ollie Norris, 18 Sione Ahio, 19 Fiti Sa, 20 Kaylum Boshier, 21 Cortez Ratima, 22 Kyle Brown, 23 Kyren Taumoefolau

Referee: Marcus Playle
Assistant Referees: James Doleman, Ben O’Keeffe
TMO: Glenn Newman