Johnny Fisher returns to the Copper Box Arena on Saturday for his promotional debut with Dana White's Zuffa Boxing, following his first professional defeat to Dave Allen in 2024. This comeback marks a significant moment in his career, as recent unconvincing performances and online criticism have questioned whether he is a serious heavyweight contender or merely an influencer boxer trading on social media popularity.

Fisher's rise through the sport was unconventional, built on minimal amateur experience and viral content created with his father "Big John", including Chinese takeaway reviews and the "Bosh!" catchphrase that spawned a dedicated fanbase. Now 27 years old with 14 professional fights (12 knockouts, one loss), Fisher has made substantial changes to rebuild his credibility, including switching trainers from Mark Tibbs to Tony Sims and signing a lucrative deal with Zuffa Boxing after five years with Matchroom, whilst undertaking intensive preparation featuring 160 rounds of sparring and altitude training. Fisher remains realistic about his level, acknowledging he is not yet at the standard of elite heavyweight champions.