Celtic go from Scottish Premiership action to Scottish Cup duty this weekend as they face a short trip to Paisley for a tie against St Mirren. The Hoops were knocked out of the Viaplay Cup at the first hurdle against Kilmarnock but remain in the other the main domestic cup competition, one they must be aiming to retain. That could prove difficult because Celtic are not playing very well at the moment. The Hibs win in midweek was a frantic struggle and the draw last Saturday with Aberdeen was frustrating. Brendan Rodgers sat in front of the media on Friday to deliver his thoughts ahead of the S…