He continued playing Tunisian ITF Futures tournaments for the remainder of the 2021 season which included a second quarterfinal appearance in November and his results during this period boosted his singles ranking to finish the year at No.1209.

He spent the 2022 season playing on the ITF Futures and ATP Challenger circuits and was able to improve his singles ranking to No.

In January 2024, it was announced McCabe was awarded a wildcard for the 2024 Australian Open main draw singles event making his Grand Slam debut.

[8] He entered the main draw of the 2024 Adelaide International as a lucky loser, making his ATP debut.

258, McCabe was awarded a consecutive main draw wildcard at the 2025 Australian Open where he recorded his first Grand Slam win in straight sets over qualifier Martin Landaluce.