United crashed out of the Lancashire Senior Cup after an uninspiring 1-0 defeat at Bolton Wanderers.
Jimmy Phillips' side booked their place in the semi-finals after a first-half strike from captain Matt Cassidy.
Brian McClair's side struggled to forge clear-cut openings until the dying stages of the game, when Ryan Shawcross headed the Reds' best chance over the bar.
United enjoyed the lion's share of possession all night, but were kept at bay by a resolute Wanderers defence.
The hosts sealed their passage through Cassidy's goal on 28 minutes. The lively midfielder charged through the Reds defence before hammering a shot past Tom Heaton.
The United keeper kept his side in the tie with a fine save from Scott Jamieson's second-half free-kick, but United struggled to claw their way back to parity.
Danny Rose saw a low shot well saved by Wanderers keeper Ali Al Habsi before Shawcross' late header crept over the bar.
United: Heaton, Lee, Rose, Shawcross, Lea, R Jones, Barnes, Hewson, Marsh (Fagan, 69), Burns, Mullan.
Substitutes: Galbraith, Bryan, Zieler.
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