On September 1st, VADA, the Voluntary Anti-Doping Association, issued a short social media statement that former three-belt heavyweight champion Anthony Joshua was free of any illegal or banned substances during last month's win over Robert Helenius. VADA wrote: "Congratulations to Anthony Joshua for successfully completing VADA testing through his August 12, 2023 bout." Helenius, however, did not successfully complete the testing program, turning up positive in a test result announced after his knockout loss. Helenius was a late replacement for Dillian Whyte, who also failed a VADA test.

AUG. 13, 2023: At London's O2 Arena on Saturday, former three-belt champion Anthony Joshua fought cautiously for most of the fight, but stepped up with a highlight-reel knockout of Robert Helenius in the seventh round of a heavyweight contest. Helenius took the fight on about six days' notice after Joshua's scheduled foe, Dillian Whyte tested positive for performance-enhancing substances. Joshua is now 26-3 with two staright wins since back-to-back title fight losses vs.Oleksandr Usyk. The 39 year-old Helenius (32-5) is expected to retire after two brutal knockout losses in a year.

AUG. 5, 2023: Today, the Voluntary Anti-Doping Association (VADA) informed Matchroom, the Association of Boxing Commissions and the British Boxing Board of Control that heavyweight Dillian Whyte returned adverse analytical findings as part of a random anti-doping protocol. Whyte was scheduled to fight forrmer champion Anthony Joshua on Saturday, August 12th in London. The event's promoter Matchroom, was unclear as to whether a replacement opponent for Joshua could be found on one week's notice. Matchroom's website said, "In light of this news, the fight will be cancelled, and a full investigation will be conducted. Further information on the event will follow."