Celtic fans were curious to see who would fill Matt O’Riley’s boots at Celtic following his exit to Brighton & Hove Albion during the summer window. Brendan Rodgers reacted convincingly in the dying embers of market activity, bringing in Arne Engels and Luke McCowan to complement existing midfield options Callum McGregor, Reo Hatate, Odin Thaigo Holm and Paulo Bernardo. Given his side’s strong start to the Scottish Premiership campaign, the manager made as few changes as possible heading into last weekend’s clash against Rangers. In the end, drip-feeding new arrivals Engels and McCowan involve…