That year Hauger claimed the ROK International title in the Mini category and followed it up the following year by claiming Mini category titles in the Vega Winter Trophy, the Italian CSAI Karting Championship and the WSK Champions Cup and Super Masters championships.

[8][9] The following year, Hauger remained at Formula 4 level, but switched to Van Amersfoort Racing to contest the ADAC and Italian F4 championships.

[11][12] Over in the Italian championship, Hauger scored twelve victories, including a weekend grand slam in the season finale at Monza, and sealed the title with a round to spare, being over 130 points ahead of fellow F1 junior drivers Gianluca Petecof of Ferrari and Paul Aron of Mercedes.

In August 2019, Motopark announced Hauger would make his debut in the championship at Silverstone replacing Liam Lawson, having had to wait a round due to clashes with ADAC Formula 4 at the Red Bull Ring.

[25] In December, Prema confirmed Hauger would race with them in the 2021 season, partnering Olli Caldwell and Ferrari Driver Academy member Arthur Leclerc.

[26] He scored his first pole position in the category at the first weekend in Barcelona, beating former British F4 rival Jack Doohan.

[31] Having tested with the team at the end of 2021, Hauger announced on 14 January that he would be partnering Jehan Daruvala at Prema Racing in Formula 2.

[33] In Jeddah's Sprint Race, Hauger started on reverse grid pole before a Safety Car communication confusion saw him served a 10-second stop-and-go penalty.

[50][51] He had a poor qualifying in Monza, but had the pace to make up 10 places to finish ninth, as well as earn a fastest lap in the Sprint Race.

[54] He also had to serve a drive-through penalty in the early part of the race for his team's failure to fit his wheels at the three minute signal before the start.

[55] In the final race weekend of the season in Abu Dhabi, he put on a strong showing by qualifying seventh on the grid.

[59] Qualifying fourth for the opening Bahrain round, he made an electric charge in the sprint race, mastering tyre wear and taking second place.

[66] The Norwegian was set for another podium finish on Sunday, but was punted from behind by Victor Martins during a late safety car restart.

[68] He stormed into the lead of the sprint race until a late safety car restart, where on cold tyres, he crashed out at turn 1 with a handful of laps remaining.

During the feature race still yet to pit, whilst running seventh, a timed red flag from a crash allowed him to switch tyres, he would cross the line in fifth place, continuing his record of scoring in every round.

[74] Silverstone was the first round where he failed to score any points, being involved in safety car restart incident during the feature race.

[85] In Yas Marina, he ended his sophomore campaign positively, passing Isack Hadjar for fourth on the last lap in the sprint, and seventh place in the feature.

[89] Hauger remains in Formula 2 for a third successive season in 2024, continuing his relationship with MP Motorsport alongside Williams Driver Academy member Franco Colapinto.

[90] Ahead of the Qatar round, Hauger opted to leave Formula 2 to focus on his Indy NXT preparation for 2025, and was replaced by Richard Verschoor.

[94] Speaking about his departure, Hauger revealed that he would not be retained as early as July and accepted "the brutal nature of such decisions".

[96] In 2025, Hauger switched to racing in America in the Indy NXT with Andretti Global, after spending three years in Formula 2.

[97] Hauger has carried a lucky amulet, which he received from his grandmother, around his neck since he started competing in international karting competitions.

2010  E. Gutiérrez 2011  V. Bottas 2012  M. Evans 2013  D. Kvyat 2014  A. Lynn 2015  E. Ocon 2016  C. Leclerc 2017  G. Russell 2018  A. Hubert 2019  R. Shwartzman 2020  O. Piastri 2021  D. Hauger 2022  V. Martins 2023  G. Bortoleto 2024  L. Fornaroli