It wasn’t an easy afternoon for St Mirren up against reigning Scottish Premiership champions Celtic. The Bhoys were on top form throughout the 90 minutes in Paisley, securing a 3-0 victory thanks to fine finishes from Callum McGregor, Reo Hatate and Alistair Johnston. Brendan Rodgers was delighted with the performance and pundit Chris Sutton, on co-commentary duties, lauded it too. For Buddies boss Stephen Robinson there was no joy to take from Celtic’s performance but he did acknowledge that the Bhoys deserved full credit for the win and the way they approached the match. Robinson says Celtic…