Undefeated Benn (17-0, 11 KOs) weighed in at 146 ¾ pounds, while Vargas (31-6-2, 14 KOs) tipped the scale at 146.4 pounds, putting both comfortably under the 147lbs ceiling for their ranked clash.

Benn will need to put forth a strong performance and defeat Canadian-Colombian Vargas if he is to prove he is ready for one of fellow Brits and former world champions Kell Brook or Amir Khan next.

Meanwhile, Savannah Marshall (9-0, 7 KOs) makes her first defence of the WBO middleweight crown vs. Sweden’s late replacement opponent Maria Lindberg (19-6-2, 10 KOs) in chief support, with Marshall making good championship weight at 159.4lbs, considerably larger than her challenger at 154.9lbs.

Another women's world title fight takes place on the show, with Shannon Courtenay weighing 117.8lbs and Ebanie Bridges at 117 bang on as they prepare to battle for the vacant WBA bantamweight crown. Their staredown was intense, with recent words exchanged in interviews and over social media elevating this one into grudge match territory.

Also on the Benn vs. Vargas undercard, Kash Farooq also gave a reading of exactly 117lbs for a men's bantamweight 10-rounder with the 117 1/2lbs Alexander Espinoza; light-heavyweight new boy John Hedges weighed 117.1lbs for his second pro bout against Croatia's Stank Jermelic (174 1/4lbs); and the debuting former rugby star Nick Campbell vastly outweighed fellow heavyweight Petr Frohlich by 248 1/2lbs to 226.4lbs.

Watch the card tomorrow on DAZN worldwide except UK, Ireland, Australia, New Zealand and China.