Dortmund's "young player project" helped Sancho function in the focal point of attack alongside a core of talented young stars like Erling Haaland, Gio Reyna and Jude Bellingham. During the September internationals, Sancho scored his debut goals for the senior team, a brace, in a 5–3 home victory over Kosovo in a Euro 2020 qualifier on 10 September.

During a 3–3 draw with 1899 Hoffenheim on 9 February 2019, he became the youngest-ever player to score eight goals in a single Bundesliga season, breaking the record previously held by Christian Wück. aufstellung" [DFB-Pokal 2020/21, Final in Berlin: RB Leipzig 1:4 Borussia Dortmund: Tactical lineup]. Sancho's goal in Dortmund's 3–3 draw with RB Leipzig on 17 December meant he had scored in seven consecutive games for the club (including in Champions League matches against Barcelona and Slavia Prague), bringing his tally up to 15 goals and 16 assists in the Bundesliga in the calendar year of 2019. Due to issues with commuting across London to the club's academy, he moved into accommodation provided by Watford and began attending their partner school Harefield Academy as a boarder, aged 11.Arsenal and Tottenham target Jadon Sancho withdraws from Manchester City training in bid to force move". Sancho was not included in United's squad for their game against Arsenal on 3 September 2023, with manager Erik ten Hag explaining that Sancho was not picked due to "his performances in training", stating that players "have to reach a level every day at Manchester United". Ahead of the 2019–20 season, Sancho won his first trophy following the DFL-Supercup victory over Bayern Munich, and later scored two goals to help Dortmund win the 2021 DFB-Pokal final.

After scoring his first goal, he removed his shirt to reveal a shirt with the message "Justice for George Floyd", a black man who was murdered earlier that week in Minneapolis by a police officer, who knelt on Floyd's neck until he became unresponsive. The two parties eventually reached an agreement where he would be available for the group stages of the competition, but his participation was not guaranteed if England progressed to the knock out rounds. Regarded as a quick, highly technical, and creative player, with excellent dribbling skills and ball control, Sancho is known for his trickery and use of feints in one-on-one situations and has been described as one of the world's best young players during his Dortmund days. On 14 August, he made his debut as a substitute for Daniel James in a 5–1 home league win over rivals Leeds United.

Finance is provided by PayPal Credit (a trading name of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH). A week later, he came off the bench to score the equalising goal in a 2–2 draw at home to Leeds United. He became friends with fellow aspiring footballer Reiss Nelson, who lived nearby, after they played together in youth tournaments. Later that month, upon scoring in a 3–2 win over Bayer Leverkusen, he broke Lukas Podolski's record to become the youngest player to score nine Bundesliga goals, aged 18 years and 336 days. Having signed a new contract keeping him at the club until 2022, [29] Sancho enjoyed a successful October 2018 by being named Bundesliga Player of the Month, registering three goals and an assist in just three league games.

Sancho made his first league start for Dortmund on 14 January 2018, hitting the woodwork in a goalless draw with VfL Wolfsburg. From Christian Pulisic to Erling Haaland via Jadon Sancho: why do Borusdia Dortmund attract the game's best young players? Coming on as a substitute for Brereton, Sancho scored the last of the goals in England's 4–1 win over Hungary in the first match of the elite round on 21 March 2018. Sancho scored his first goal of the 2022–23 season in a 2–1 home victory over Liverpool on 22 August 2022. Previously a youth player with Watford and Manchester City, Sancho signed his first senior contract with Borussia Dortmund in 2017.

Jadon Malik Sancho [3] was born on 25 March 2000 [4] in Camberwell, Greater London, [5] to a mother from Trinidad and Tobago and father of Jamaican and Guyanese descent. Although he is known in particular for his ability to get past opponents and create chances for teammates, he is also capable of scoring goals himself. In July, Sancho was omitted from City's pre-season tour squad due to a dispute over assurances of playing time in a new contract.