Thistle have been given a pre-Scottish Cup boost after influential midfielder Mark Millar's red card was quashed in time for the biggest match of the season.
With a last eight spot at stake, Largs are thrilled to have the benefit of the experienced ball winner who always seems to be a step ahead of the opposition.
It is a 2pm kick-off at the James McGrory Park against St Roch's who were one of the surprise packages of the fifth round of the Macron Scottish Cup after pulling off a draw at Premiership Largs.
However, Thistle have a full squad to pick from, and boss Stewart Davidson, who netted the winner in the 2009 Scottish Cup for Talbot v Clydebank, believes Largs can push on for a quarter final spot.
He said: "It is great news to have Mark Millar back in the reckoning. We felt that he was unfairly dismissed in the first game and the decision has been overturned. Common sense has prevailed.
"Mark went to his appeal with video evidence, and was correctly cleared."