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) club's heaviest ever European defeat and the second-heaviest in the club's history. A level of pride was restored in the next Champions League tie, Celtic holding Manchester City to a 3–3 draw at Celtic Park and ending the high-spending English club's run of ten consecutive wins, with Dembélé scoring twice. Further draws away at Borussia Mönchengladbach and in the return match at Manchester City saw Celtic finish the group on three points, albeit coming fourth and going out of Europe. Celtic continued their unbeaten run in domestic competitions into the New Year, during which time the club won their 100th