Celtic have completed the record signing of Arne Engels from Augsburg for £11m, breaking their previous transfer record. Engels, who scored three goals and had two assists last season, is seen as a replacement for Matt O'Riley who moved to Brighton. Additionally, Celtic signed Auston Trusty from Sheffield United for up to £6m, along with Luke McCowan on deadline day. Trusty, who can play both left-back and center-back, signed a five-year contract. These moves come as Celtic aims to strengthen their squad for the upcoming Champions League campaign after being drawn into a challenging group. Manager Brendan Rodgers expressed excitement over the new acquisitions, citing their potential contributions to the team.