Daryl Powell believed Oliver Holmes should not have been sent off in Castleford's defeat to Leeds.
The Tigers lost 28-24 to the Challenge Cup winners despite playing 50 minutes with 12-men.
Holmes was sent-off following an incident with Richie Myler, where he appeared to kick the fullback.
The forward had been struck by Myler while the paiAlready a subscriber? Log in here
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