Born in
Rollingen,
Mersch,
Luxembourg, Jungels competed in the
Tour de France for the first time in
2015, as part of the
UCI World Tour team , finishing 27th overall and 5th in the
young rider classification.
Etixx–Quick-Step (2016–20) Jungels signed for for the 2016 and 2017 seasons. He was named in the start list for the
2016 Giro d'Italia where he finished sixth overall and won the
young rider classification. In 2017 he confirmed his ambitions in the
general classification by finishing 8th in the
Giro d'Italia. He also defended the
young rider classification from the previous edition. Only
Vladimir Poulnikov and
Pavel Tonkov won the classification in consecutive years before him. In the process he was able to take stage 15 and became the first rider from Luxembourg, since
Charly Gaul 56 years earlier, to win at the
Giro d'Italia. In 2018, Jungels won
Liège–Bastogne–Liège after a solo attack on the Côte de la Roche-aux-Faucons.
AG2R Citroën Team (2021–22) In August 2020, Jungels signed a two-year contract with the from the 2021 season. His first season with the French squad was hampered first by a back injury and then a head injury suffered in a crash in the
Amstel Gold Race. Then in June 2021 the team announced that he would miss the
Tour de France and the
COVID-19 pandemic-delayed
2020 Summer Olympics for surgery for iliac artery endofibrosis. He returned to competition after a 93-day absence at the
Tour de Luxembourg in September. Jungels regained his title at the
Luxembourgish National Time Trial Championships in 2022, finishing around half a minute faster than any other competitor over the course in
Nospelt. Following this success, Jungels' next race was the
Tour de France – prior to the race, he tested positive for
COVID-19 on the two days prior to the opening
individual time trial stage, but was allowed to compete by both the
Union Cycliste Internationale (UCI) and race organisers
Amaury Sport Organisation (ASO). After finishing in the top-ten placings in the sprint finish on stage eight, Jungels got into the breakaway on the following stage. On the day's third categorised climb, the Col de la Croix, Jungels attacked the breakaway group with left to climb. Jungels eventually soloed to victory as the race returned to France, finishing 22 seconds clear of
Jonathan Castroviejo in
Châtel, to become the first cyclist from Luxembourg to win a stage since
Andy Schleck in
2011. He ultimately finished the race in 12th place overall.
Bora–Hansgrohe (2022-24) In August 2022, it was announced that Jungels was to join for the 2023 season, on an initial two-year contract with an option for a further year.
Ineos Grenadiers In August 2024, it was announced that Jungels was to join for the 2025 season, on a two-year contract. ==Career achievements==