Bryan Prunty knows Airdrie are in for a tough time against cup opponents Dundee United, but the Diamonds hitman insists anything can happen.

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Prunty came off the bench in Airdrie's 2-1 win over Monklands rivals Albion Rovers last weekend, and his delight was plain to see as fellow substitute Jim Lister headed home a last gasp winner.

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Following a nightmare 3-match run of defeats, the derby victory has come at the ideal team as the Diamonds prepare to face Premiership opposition in the fourth round of the William Hill Scottish Cup, and Prunty says the New Broomfield dressing room is a much happier place now.

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"Winning the Derby last week has given everyone at the Club a real boost after a few disappointing displays and results. 

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"The cup game is a welcome break from the league and hopefully we can spring a surprise."

There's certainly no looking back from the popular striker as he points out the importance of taking maximum points at Cliftonhill.

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"We must take confidence from last week. Albion Rovers is an extremely difficult venue to go and get points from - they've only lost two league games at home this season and both have been against us. 

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"We would like to take the positives from the derby game and put them to good use against Dundee United."

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Although the Tannadice side are struggling in the top division this season - recently appointing former player Mixu Paatelainen as manager following the dismissal of Jackie McNamara - the visitors are firm favourites with the bookmakers.

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Bryan, who turns 33 next week, is realistic about the gulf in status between the sides but has enough experience to know that the bookies sometimes get it wrong.

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A cup shock would be the ideal birthday present for 'Prunts'.

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"We know that we'll be in for a tough match against the Premiership team. At the end of the day they are playing at the highest level in Scotland because they are good players.

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"However, being the home side we hope to make things as difficult as possible for them and have a good go.

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"It's the cup... anything can happen!"

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Goalkeeper Neil Parry is suspended for the home side after an appeal against his dismissal in the Boxing Day match against Peterhead was thrown out.

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Gavin Gunning and Ryan McGowan are banned for the visitors, who include former Diamonds loan star Scott Fraser in their squad.

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Greg Aitken referees the fourth round tie.