Guzman came in for the first official weigh-in a quarter-pound heavier than the mandatory 140 lbs., needing two more attempts to finally make weight.
For at this morning's official weigh-in, Duran was 3 pounds under the 160-pound weight limit.
They said Gatti weighed 141 pounds at the gym and did not drink anything until after he got off the scales at the official weigh-in.
But he was down to 175, the light-heavyweight limit, at the official weigh-in Friday.
Unlike the official weigh-ins, no elimination takes place.
Domingo came in at 119 pound during the official weigh-in.
The official weigh-in for the fight took place in Cologne, Germany, on March 18.
Oxford and Cambridge came face to face for the first time today when the scales were set for the official weigh-in.
However, he failed to show up at the official weigh-in the day before and was scratched from the card.
"The official weigh-in is going to be Friday," he said.