With the imminent sale of Matt O’Riley to Brighton, Celtic have plenty of work to do in the final week of the transfer window to improve Brendan Rodgers’ squad. When O’Riley’s departure goes through the Bhoys will be weaker than they were at the end of last season. Chris Sutton has lamented the current situation Celtic find themselves in, with fans and Rodgers also making noise about wanting to add quality before the deadline. There’s still time to do the business needed and one player they’ve been monitoring is Augsburg midfielder Arne Engels. Celtic begin negotiations to bring Engels to Glas…