Hull returned to winning ways to keep their treble hopes alive but they resembled anything but potential Super League champions in an 18-12 victory over Wakefield.
The Challenge Cup winners were second best for long periods of a disappointing match and were in danger of going down to a third successive defeat since their Wembley triumph .
But former Melbourne Storm centre Mahe Fonua produced a piece of individual brilliance to score the all-important try nine minutes from the end.
Lee Radford's men are now just a point behind Warrington and need Wigan to beat the table-toppers to set up a showdown with the Wolves for the League Leaders' Shield in Hull.
Wakefield who were led out by another ex-Storm player in prop Scott Anderson on his final home appearance as he prepares to hang up his boots.
They have have now lost six out of six matches in the Super 8s but coach Chris Chester will be proud of his players' efforts in defeat.
