After the semifinal defeat against the British Chelsie Giles, she lost to against Distria Krasniqi from Kosovo for the bronze.

At the same championships, her twin sister Seija Ballhaus won in the weight class up to 57 kg division.

[2] In March 2023, Mascha Ballhaus won the final of the Judo Grand Slam Tashkent against the Japanese Ai Shishime.

With victories over the Israeli Gefen Primo in the repechage round and over the Italian Odette Giuffrida in the fight for third place, Ballhaus won a bronze medal.

With victories over Brazilian Larissa Pimenta and Japanese Hibiki Shiraishi, Ballhaus secured a bronze medal at the World Championships.