In May, at the age of 16, Engel became the youngest German men's title winner since 2003 when he won an ITF World Tennis Tour tournament in Villach, Austria.[3]
Engel made his ATP Challenger Tour main draw debut at the Tennis Open Karlsruhe, having received a wildcard. He defeated world No. 138 and five-time major doubles champion Pierre-Hugues Herbert in the first round to claim his first Challenger main draw win and first top-150 win.[4] Engel came through qualifying to reach the main draw at the JC Ferrero Challenger Open and claimed his second top-150 win after defeating world No. 121 (and former world No. 63) Luca Van Assche in the second round. He reached his first Challenger quarterfinal at the tournament, where he eventually lost to Jérôme Kym.
At the age of 17, Engel made his ATP Tour main draw debut at the Almaty Open after receiving a main draw wildcard. He defeated Coleman Wong in straight sets to claim his first ATP Tour main draw win, becoming the youngest player to do so since Carlos Alcaraz at the 2020 Rio Open and the first player born in the year 2007 to win an ATP match.[5]