Floyd Mayweather's planned return to the ring has been put on hold once again. Just hours before the boxer was scheduled to face Greek kickboxing legend Mike Zambidis in Athens on Saturday, June 27, the exhibition was officially called off after a New York lawsuit over a multi-million-dollar promotional agreement threw the event into limbo.
According to court filings obtained by TMZ, Mayweather's attorney stated that the event would not proceed while litigation remains pending in the United States. The decision comes days after CSI Sports Events sued Floyd Mayweather, alleging he breached an exclusive promotional agreement after accepting millions in advance payments.
"Because Plaintiffs' Motion remains pending without a ruling, the Mayweather-Zambidis event will no longer proceed in Athens, Greece, as planned on Saturday evening," attorney Melissa Glass wrote in a filing.
Glass added that the legal dispute "has effectively stopped any promotion or distribution plans for the event and halted ticket sales."
The lawsuit claims CSI Sports Events paid Mayweather a combined $4.65 million in advances for exclusive rights tied to an exhibition against Mike Tyson and a professional rematch with Manny Pacquiao.
According to the complaint, Mayweather later announced the fight against Zambidis despite contractual language that allegedly prohibited him from participating in any other event before satisfying his obligations to Tyson.
CSI is seeking repayment of the advances and has asked the court to block the Greece exhibition altogether.
The Tyson exhibition had originally been planned for spring 2026 before it was postponed after Tyson suffered a hand injury during training. Although that fight never received an official date or venue, the lawsuit alleges Tyson remained available to reschedule within the contractual window, meaning Mayweather was not free to take another bout.
The cancellation adds another chapter to what has become one of the busiest years of Mayweather's career outside the ring. In recent weeks, the undefeated former champion has been hit with felony charges in Nevada over allegations that he passed a $200,000 bad check to purchase a luxury watch.
He has also been linked to a reported $7.3 million IRS tax lien and multiple civil lawsuits involving unpaid rent, jewelry purchases, private jet services, and child support.
At the same time, Mayweather has launched lawsuits of his own, including a $340 million case against Showtime Networks and a $175 million fraud lawsuit against former adviser Jona Rechnitz.
Despite the cancellation, organizers indicated the matchup with Zambidis is only being postponed—not abandoned.
Announcing the delay, promoters told fans, "Some battles are worth waiting a little longer to get their story right."
No new date for the Floyd Mayweather-Mike Zambidis exhibition has been announced.
