The 2013–14 season was Chelsea Football Club's 100th competitive season, 24th consecutive season in the top flight of English football, 22nd consecutive season in the Premier League and 108th year in existence as a football club. Chelsea participated in the UEFA Champions League this season, qualified directly for the group stage by virtue of finishing third in the 2012–13 Premier League, and reached the Semi-finals stage, being knocked out by Atlético Madrid. Chelsea came third in the Premier League for a second successive season, thus again qualified for the UEFA Champions League group stage. Chelsea ended their 2013–14 campaign without a trophy, a first since the 2010–11 season. Their league performance, however, at 82 points, was the best one since the 2009–10 season.

On 3 June, Chelsea announced that former manager José Mourinho had been appointed as the new manager for the 2013–14 season. He signed a four-year contract with the Blues, up to the end of the 2016–17 season. He was re-united with former squad members John Terry, Frank Lampard, Ashley Cole, John Obi Mikel, Petr Čech, Henrique Hilário and Michael Essien whom he brought back from his loan spell at Real Madrid. Mourinho also brought three coaching staff members with him to Stamford Bridge in Rui Faria, Silvino Louro—both of whom had worked at Chelsea under Mourinho's previous tenure—and José Morais. Mourinho was officially announced to the media on 10 June and took charge of the team on 1 July for the pre-season. One of Mourinho's first games was against Barcelona rival Pep Guardiola, as he managed 2012–13 UEFA Champions League winners Bayern Munich in the 2013 UEFA Super Cup at the Eden Arena in Prague. In Mourinho's first official interview back, he referred to himself as "The Happy One" in regards to his appointment as the new Chelsea manager, having called himself "The Special One" during his first tenure.

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