2015. He kept a clean sheet in every round of the competition, which included playing in the first Old Firm game for three years. According to The Scotsman in March 2015, Gordon was attracting the attention of Chelsea. He made his 50th Celtic appearance in a 2–1 league win at Dundee on 22 April 2015. A day after shutting out Dundee in a 5–0 home win, Celtic became league champions after Aberdeen lost at Dundee United on 2 May 2015. It was his first league title as a player. Gordon played 52 times and kept 28 clean sheets in his first season at Celtic. Gordon was voted Player of the Year by the Scottish Football Writers' Association, and was selected in the PFA Scotland Premiership Team of the Year. He was omitted from the PFA Players' shortlist, despite having been touted amongst the favourites to win it. 2015–16 For the 2015–16 season, Gordon was assigned the number 1 shirt to wear, replacing the number 26 shirt he wore when he was signed. In July 2015, Gordon signed a new contract with Celtic until 2018. His first match of season 2015–16 was the 2–0 UEFA Champions League second qualifying round first leg win at home to Stjarnan on 15 July 2015. Celtic progressed 6–1 on aggregate. The 1–0 win against Qarabağ, in the third qualifying round first leg at home, was his 30th clean sheet in 55 appearances for Celtic. Celtic advanced 1–0 on aggregate. Gordon also started the league campaign with consecutive clean sheets against Ross County and Partick Thistle. However, Gordon's form at this time was generally poorer than the previous season, in part due to Celtic struggling to find a settled defensive line-up following the departures of centre-halves Virgil van Dijk and Jason Denayer. 2016–17 Gordon saved a penalty in a 2–0 second leg defeat at Hapoel Be'er Sheva in the UEFA Champions League play-off round, with Celtic progressing to the group stage after a three-year absence 5–4 on aggregate. He made his first ever appearance in the UEFA Champions League group stage in a 3–3 home draw with Manchester City on 28 September 2016. Gordon won his second League Cup with the club without conceding a goal in the competition (just like in 2014–15), after Celtic beat Aberdeen 3–0 in the final, as the club won its 100 major trophy on 28 November 2016. He kept a