Celtic midfielder Matt O'Riley is at the center of intense transfer speculation, with Atalanta emerging as the frontrunner after Southampton withdrew from the race. Atalanta has reportedly submitted a new bid of €25 million plus €2 million in bonuses, edging closer to Celtic's asking price of £25 million. Despite O'Riley's apparent agreement on personal terms with Atalanta, Celtic remains firm on their valuation, holding out for a higher fee before considering a sale. The interest in O'Riley has not only come from Atalanta but also from clubs like Chelsea, Liverpool, and Inter Milan, although none have made concrete offers. Meanwhile, Kylian Mbappé made a successful debut for Real Madrid, scoring in their 2-0 win over Atalanta in the UEFA Super Cup. As the transfer window progresses, Celtic is also eyeing Augsburg's Arne Engles as a potential replacement should O'Riley leave.