By Jake Donovan

The actual fight itself isn't for another day, yet the rematch between Amnat Ruenroeng and Johnriel Casimero is already mired in controversy.

Both fighters made weight ahead of their flyweight title fight sequel, each coming in right at the 112-pound flyweight divisional limit. Confusion came prior to what actually served as the official weigh-in, when each boxer was led to believe they were well above the limit.

As Wednesday's title fight is part of the annual International Boxing Federation (IBF) convention in Beijing, China, a slew of activities were on the itinerary for participants and visitors.

Included among the day's list of things to do was a "mock" weigh-in staged outside the Great Wall of China. The event was meant as a publicity stunt and photo-op, with former heavyweight king Mike Tyson on hand as part of the festivities. 

Unfortunately, word didn't make its way to the proper people, including the participants. Casimero - whose junior flyweight reign ended with his coming in nearly six pounds heavy for his May '14 1st round knockout of Mauricio Fuentes - was announced as having weighed in at 113.25-pounds for his second crack at a flyweight belt. 

That amount was trumped by Ruenroeng, who was in disbelief in seeing the scale ready 117.75-pounds, a weight that - had it been accurate - would have disallowed him to even attempt to try to shrink down to flyweight due to safety hazard. 

Fortunately, the right information was passed along to the athletes before either went to extreme measures to attempt to make weight. 

"It was a mock weigh-in with the back drop of the Great Wall," IBF spokesperson Jeanette Salazar explained to BoxingScene.com on Tuesday. "Unfortunately, that wasn't properly communicated. It's not the most level ground or truly ideal for a real weigh-in.

"They were weighed at 4:30pm (local time) back at the hotel and both made weight." 

Ruenroeng (17-0, 5KOs) attempts the sixth defense of the flyweight crown he obtained in Jan. '14. The 36-year old Thai boxer is fighting for the third time outside of his home country, in fact with his best career wins coming on foreign soil. 

His first defense produced the lone loss in the impressive career of Kazuto Ioka, whose attempt at becoming a three-division champ was foiled in their May '14 meet. Ioka went on to claim a flyweight belt, but the moment would come more than a year after losing a 12-round decision to Ruenroeng, who has also outpointed McWilliams Arroyo and three-time Olympic medalist Zou Shiming.

The win over Shiming also took place in China, where he fights for the second time with Wednesday's forthcoming adventure. 

Casimero (21-3, 13KOs) previously served as a junior flyweight titlist, a reign that began with chaos. The squat Filipino boxer scored a 10th round stoppage of Luis Lazarte, a notoriously dirty fighter who believed his fighting at home in Argentina would give him the edge in their Feb. '10 interim title fight. 

It did bring the passion out from the fans, as a riot ensued, with chairs being flung around the venue as Casimero and his team - including Sean Gibbons - barely escaping the madness. 

Three successful defenses followed before conceding the title at the scales. Just two fights have followed, both coming at the flyweight limit. The 26-year old has not fought since coming up short in his foul-filled and poorly officiated first bout with Ruenroeng last June. 

Both boxers are due to perform the IBF same-day weigh-in on Wednesday morning. It's safe to say, the session will take place in a proper setting free of publicity or controversy. 

Jake Donovan is the managing editor of BoxingScene.com. Follow his shiny new Twitter account: @JakeNDaBox_v2