Brighton & Hove Albion have signed 23-year-old Denmark midfielder Matt O'Riley from Celtic for a reported £25 million on a five-year contract. O'Riley, who scored 27 goals and provided 35 assists in 124 appearances for Celtic, was named Celtic's Player of the Year last season. Brighton has had an active transfer window, with O'Riley being their eighth signing, and they are also close to signing Turkey international Ferdi Kadioglu. Manager Fabian Hurzeler praised O'Riley's ability to balance offensive and defensive play, calling him a 'specialist' in his position. Meanwhile, Celtic are looking to bolster their squad with new signings, including Augsburg's Arne Engels and LA's Mateusz Bogusz. Brighton's impressive start to the season includes back-to-back victories, positioning them second in the Premier League.