Ukraine's Wladimir Klitschko (58-3, 50 KO) tipped the scales at at 246.9 lb (112 kg) while Poland's Mariusz Wach (27-0, 15 KO) came in at 249.1 lb (113 kg).
Standing 6'6½," the champion is about 2 lbs lighter than he was when he stopped Tony Thompson in July while the the 6'7½" Wach will enter the ring about 2 lbs heavier today than he was when he last fought in March.
Klitschko's highest weight, to date, is 249 lbs versus Thompson in July. Wach, on the other-hand, weighed a whopping 274¾ lbs/124.6 kg for a bout in 2007.
Wach is the first opponent to have a height advantage (one inch) over Klitschko and, not surprisingly, he also has about an inch on the champion in reach.
For the first time since 2003, Emanuel Steward was not at Wlad's side. The longtime trainer passed away several weeks ago at age 68.
Prior to entering the hospital, the legendary trainer stated in late August:
"I have my work cut out for me with this assignment. Wach will not only be the biggest opponent Wladimir has fought since we've been together, he will also have the mentality of an undefeated fighter when he steps in the ring."
"Wach will be coming into the championship bout brimming with confidence."
Steward continued,"Trying to come up with a strategy for a fighter this big is going to be interesting.But this isn't the first time we've ever had to come up with a winning fight plan against a difficult opponent and it won't be the last."
But unlike the dearly departed boxing icon, many see Klitschko vs Wach as a virtual mismatch, insisting the champion is far too poised, polished and skillful for the Polish challenger.
Handling training duties in Steward's absence was Jonathan Banks who will also serve as Klitschko's chief second on fight night. The 30 year old Banks, a professional fighter himself, has been a sparring partner for Wladimir Klitschko for quite some time and is also a longtime Steward protégé.
Klitschko vs Wach will serve as Wlad's 6th defense of the RING Magazine/Lineal title and his 12th world title defense since starting his second reign in April 2006. It will be his 18th defense overall.
The referee will be Eddie Cotton from the United States and the judges at ringside will be Pasquale Procopio of Canada, and Adalaide Byrd and Michael Ancona from the United States.
Klitschko vs Wach weigh in video