It took Rangers four years to climb through the lower divisions and re-take their place in the Scottish Premiership for the 2016–17 season; in the interim only two cup semi-finals were played between the clubs[1][2][3][4] and Celtic won all four league titles by significant margins (never less than 15 points).[5] The rivalry resumed in earnest by way of six matches during 2016–17, with Celtic eliminating Rangers from both cups at the semi-final stage on the way to lifting the trophies and emerging victorious in three of the matches in the league championship, which they also won without losing a game to secure their sixth successive title and a domestic treble.[6][7] The 2017–18 season was much the same: Celtic won three of the Old Firm league fixtures[8] plus a Scottish Cup semi-final meeting[9] and lifted all three domestic trophies;[10] Rangers finished third, behind Aberdeen.[11]