Championship favourites Featherstone made a losing start to their league campaign when they were pipped 11-10 at Dewsbury Rams on Sunday.
A drop goal from Anthony Thackeray two minutes from time condemned Rovers to their first defeat under new coach John Bastian.
Featherstone must be wondering how they lost a game they dominated for long spells.
They bossed a scoreless first-half.
They monopolised possession and kept the Rams pinned in their own half for most of the opening 40 minutes but they were unable to convert their dominance into points.
They eventually broke the deadlock in the 50th minute when Jack Bussey’s clever pass put in James Mendeika.
Dewsbury hit back when Wayne Goodwin went over from acting half and Keiran Hyde converted.
The game swung back Featherstone’s way in the 71st minute when Matt James set up a try for Bussey that Gareth Moore goaled to put them 10-6 up.
Thackeray darted over from close range three minutes later but Hyde missed the conversion to leave the scores tied.
Thackeray then landed his one pointer to give the Rams the edge.
Dewsbury: Sherriff; Morton, Pryce, Grady, Scott; Hemingway, Thackeray; Nash, Godwin, Hepworth, Spicer, Hale, Brown. Substitutes: Hyde, Haggerty, Aizue, Gallaghger.
Featherstone: Mendeika; Sharp, Hellewell, Worthington, Saxton; Bussey, Moore; Crossley, Ellis, Hirst, Lockwood, Spears, James. Substitutes: Flanagan, Dale, Bostock, Cording.
Referee: Chris Leatherbarrow.