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
2017–18 Celtic F.C. season qualifier. The Scottish Premiership fixture list was announced on 23 June 2017. Celtic began the defence of their title with a 4–1 victory against Heart of Midlothian at Celtic Park. On 4 November, Celtic broke their own British record for the number of games without defeat in all domestic competitions, a record set by Willie Maley's team that stood for 100 years. However, the unbeaten run ended at 69 games, following a 4–0 defeat to Heart of Midlothian at Tynecastle Park on 17 December. On 29 April 2018, Celtic won their seventh consecutive title and 49th overall after a 5–0