Wladimir Klitschko vs. Lamon Brewster was a professional boxing match contested on April 10 2004, at the Mandalay Bay Resort & Casino in Las Vegas, Nevada, for the WBO Heavyweight Championship.
After his shock knockout defeat at the hands of Corrie Sanders, Klitschko first brought in new trainer Freddie Roach to assist lead trainer Fritz Sdunek for his quick knockouts of Fabio Eduardo Moli and Danell Nicholson. Following these fights Roach left the Klitschko camp to make way for new lead trainer Emanuel Steward who had become available after the retirement of WBC & Lineal champion Lennox Lewis.
Brewster was on a five-fight win streak (all by TKO) since his 2000 defeats against Clifford Etienne & Charles Shufford, he was previously set to challenge newly crowned WBO title holder Corrie Sanders, who declined the fight in favour of a bout with Vitali Klitschko for the vacant WBC belt. He was then set to face David Tua for the vacant belt in February 2004 before Tua unexpectedly pulled out. In the midst of this, in October 2003, his veteran trainer Bill Slayton died at the age of 81. After a press conference before the fight Brewster was seen in tears after talking about Slayton's death, in sullen anger punching the microphone off its mount and on to the floor, leading to comparisons with Buster Douglas whose mother passed away in the build-up to his title bout with Mike Tyson.
Just before the main event Cory Spinks defended his Undisputed welterweight championship against former Light welterweight champion Zab Judah. After a competitive bout in which both fighters where knocked down late, Spinks won a Unanimous Decision with scores of 116–111, 114–112 & 114–112.
The first four rounds were dominated by Klitschko, who knocked Brewster down in the fourth with a right hand and appeared to be close to stopping the American but he made it through the round. In the fifth round Klitschko appeared somewhat fatigued and, with less than a minute left in the round, Brewster caught him with a pair of left hooks that sent him into ropes which referee Robert Byrd ruled a knockdown. Brewster then dominated the remainder of the round before Klitschko hit the canvas shortly after the bell had sounded to end the round. After making it back to his feet Klitschko attempted to return to his corner but Byrd waved the fight off, giving Brewster a TKO victory and the WBO belt. Throughout the fight, Klitschko landed 39% of his punches, while Brewster landed just 27%.
Shortly after the fight Klitschko was rushed into hospital. An examination showed Klitschko's blood sugar level almost two times higher than the permissible norm. According to members of Klitschko's team, the doctor told them that Klitschko had been "inches away" from falling into diabetic coma, and that with blood sugar level that high, Klitschko would've been incapable of handling a single proper training session. After returning from the examination to the hotel, he fell ill with nausea, followed by physical weakness. On 12 April, he arrived in Las Vegas and provided blood and urine samples for an independent examination, which was supposed to be done by Donald Katlin, who specialized in such cases. The examination showed no signs of anabolic steroids in his blood, but Katlin suggested that Klitschko could have been poisoned with Haloperidol. The drug has no taste or smell and causes mental disorders, which are accompanied by impaired coordination, a weakening reaction and overall physical weakness. Following the results, Klitschko demanded the tests taken by the Medical Center of South Nevada and the Nevada Quest Diagnostics to be passed on to Dr. Robert Wow for further research, but the A sample had already been disposed of, while the B sample, which was supposed to be stored for years, disappeared. Dr. Margaret Goodman, the chairwoman of the Nevada State Athletic Commission's medical advisory board and Nevada's chief ringside physician, was in the ring and attending to Klitschko seconds after the referee stopped the fight. Her initial diagnosis of a Grade 3 concussion was confirmed at the hospital after further tests. Goodman was skeptical of the theory that Klitschko had been drugged.
As a result of the circumstances that surrounded the fight, FBI started an investigation. Judd Bernstein, the lawyer representing Klitschko, suggested that he was a victim of an ongoing fight fixing in Las Vegas (which also included fraudulent medical reports), which was investigated by FBI at the time. Bernstein, along with some other journalists, pointed out that in the last 48 hours before the beginning of the fight, the betting odds in favor of Klitschko rapidly dropped from 11-to-1 to 3.5-to-1. According to journalist Keith Teixeira, a group of approximately 40 people associated with Brewster's manager Sam Simon bet from $50,000 to $100,000 on Brewster's victory.
