Celtic are at the beginning of a significant week that will end on Sunday with the first Glasgow Derby of the season against Rangers on home soil. Brendan Rodgers will hope his side have some new additions available to feature, with Barcelona left-back Alex Valle close to joining the club on loan. The Bhoys have also put in formal bids for Augsburg midfielder Arne Engels and LAFC attacker Matetuz Bogusz. According to reports, the former has agreed personal terms as the race for late window arrivals intensifies. Auston Trusty may also enter the fold before then. The reigning Scottish Premiershi…