Bulldogs’ three-match winning run in the Betfred Championship ended when they lost 36-16 to Leigh Centurions six days ago.
But Diskin described that as Leigh’s best performance of the season and insisted: “We didn’t play badly last week.
“A bit fatigue got us and we conceded a couple of soft tries which made the scoreline worse than it should have been, but the boys had a real dig and I was proud of their efforts.”
York are three places and six points ahead of Batley in the table.
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Batley are “down to the bare bones” without suspended duo Wayne Reittie and Jack Downs and Diskin warned: “They will be full of confidence, they’ve picked up some quality results.
“We are up against it, but we are going there confident.
“We played well against them in the [pre-season] Yorkshire Cup.
“We dropped off after that, but we’ve shown glimpses of getting back to that sort of quality.”
Reittie received a one-match suspension for his Good Friday red card against Dewsbury Rams, but would not have played tomorrow due to a groin tear.
Downs is beginning a three-match ban.