Castleford eventually overcame Northern Ford Premiership Doncaster but only
after a second-half scare.
The Dragons stormed back from 22-0 down after 16 minutes to cut the deficit to
22-14 10 minutes into the second half.
Super League Castleford continued to make hard work of it until finally
putting the game beyond Doncaster's reach with late tries from Jon Wells and
Michael Eager.
Both touchdowns came while Doncaster were down to 12 men after substitute
Billy Conway was sin-binned.
The Tigers took a third-minute lead when Michael Smith and Mitch Healey linked
to send skipper Danny Orr over.
Three minutes later Smith and Wayne Bartrim split open Doncaster's defence for
Eager to go in for the first of his two tries.
Winger Darren Rogers collected his first try in the ninth minute and added his
second seven minutes later by eluding three defenders.
Bartrim's third goal put the Tigers 22 points ahead but the Dragons recovered
magnificently from their disastrous start.
They opened their account six minutes before half-time when Martin Moana put
substitute Jamie Fielden through for a try that Chris Ross improved.
The Dragons got back into contention with two tries early in the second
period.
Moana sent Marvin Golden over and Ross went in from close range.
But Doncaster's hopes of reaching the semi-finals for the first time ended
when Conway was shown the yellow card for holding down in a tackle.
The Tigers capitalised when Wells and Eager both went over.