Five days later, Christensen made his debut in a 4—0 loss at.
On 9 January 2018, Christensen signed a new four-and-half-year deal with Chelsea running until 2022, after establishing himself in the first team.
He scored his first professional goals on 5 February 2016, a brace in a 5—1 win over at.
Eight days later, he made his first Premier League start in a 2—1 victory over Tottenham Hotspur at.
وأوضحت أن النادي اللندني مستعد لمنح أندرياس كريستنسن راتبًا يبلغ 120 ألف جنيه إسترليني إسبوعيًا، بدلًا من راتبه الحالي الذي يُقدر بـ78 ألف جنيه إسترليني فقط.
In the , Christensen scored the final goal of a 4—2 win away to in the second leg of the last 32 to assure a 4—3 aggregate win.