Otto Virtanen defeated Grégoire Barrère in the first round of the ATP Challenger event in Quimper on hard court on 23 January 2024. Virtanen's victory over the French player marks a significant result at the lower-tier Challenger level, where the Finnish player continues to build momentum in his professional campaign. The win provides Virtanen with progression to the next phase of the tournament and an opportunity to test himself against higher-ranked opposition in subsequent rounds.