Morata made his competitive debut in the 2017 FA Community Shield match against Arsenal, coming on as a substitute in the 74th minute as his team lost on penalties after drawing 1–1 in normal time, with Morata missing in the shoot-out. On 12 August 2017, he scored and provided an assist for David Luiz in his first appearance in the Premier League, a 2–3 defeat at home to Burnley – his goal was a header in the 69th minute of the game to cut the deficit to 3–1. On 23 September, he scored his first hat-trick for Chelsea in a 4–0 away win against Stoke City; this made him the 17th Chelsea player to score a hat-trick in the Premier League.