Celtic F.C. their sixth successive league title on 2 April 2017, with a record eight league games to spare. As Celtic's unbeaten domestic run continued, they subjected Rangers to their heaviest defeat at Ibrox since 1915, 5–1, on 29 April. Celtic's 2–0 win over Hearts on 21 May saw them finish 30 points ahead of second-placed Aberdeen in the league, with a record 106 points, and the team became the first Scottish side to complete a top-flight season undefeated since Rangers in 1899. On 27 May 2017, Celtic clinched their fourth treble by defeating Aberdeen 2–1 in the Scottish Cup final. The
History of Celtic F.C. (1994–present) best for the future." Norwegian Ronny Deila was appointed manager of Celtic on 6 June 2014. He signed a 12-month rolling contract with the club, with former Celtic midfielder and Scotland international John Collins appointed as his assistant. After going unbeaten on a pre-season tour in Austria, Deila's first competitive match as manager of Celtic, a Champions League qualifying tie away against KR Reykjavik on 15 July 2014, ended in a 1–0 win with midfielder Callum McGregor scoring the decisive goal on 84 minutes. Celtic eased to a 4–0 win in the return match in Scotland, but were comprehensively beaten