UFC 251: Kamaru Usman versus Jorge Masvidal and other title fights get green light after weigh-in at Fight Island

Jose Aldo and Petr Yan come in at 135lbs for the vacant bantamweight clash

Kamaru Usman of Nigeria poses on the scale during the UFC 251 official weigh-in inside Flash Forum at UFC Fight Island on Yas Island in Abu Dhabi on Friday. All photos by UFC / Getty Images / Zuffa LLC

Jorge Masvidal poses on the scale during the UFC 251 official weigh-in.

Amanda Ribas of Brazil poses on the scale during the UFC 251 official weigh-in.

Rose Namajunas poses on the scale during the UFC 251 official weigh-in.

Martin Day poses on the scale during the UFC 251 official weigh-in.

Davey Grant of England poses on the scale during the UFC 251 official weigh-in.

Danny Henry of Scotland poses on the scale during the UFC 251 official weigh-in.

Maxim Grishin of Russia poses on the scale during the UFC 251 official weigh-in.

Max Holloway poses on the scale during the UFC 251 official weigh-in.

Roman Bogatov of Russia poses on the scale during the UFC 251 official weigh-in.

Elizeu Zaleski dos Santos of Brazil poses on the scale during the UFC 251 official weigh-in.

Paige VanZant poses on the scale during the UFC 251 official weigh-in.

Jose Aldo of Brazil poses on the scale during the UFC 251 official weigh-in.

Volkan Oezdemir of Switzerland poses on the scale during the UFC 251 official weigh-in.

Alexander Volkanovski of Australia poses on the scale during the UFC 251 official weigh-in.

Jiri Prochazka of the Czech Republic poses on the scale during the UFC 251 official weigh-in.

Leonardo Santos of Brazil poses on the scale during the UFC 251 official weigh-in.

Jessica Andrade of Brazil poses on the scale during the UFC 251 official weigh-in.

Marcin Tybura of Poland poses on the scale during the UFC 251 official weigh-in.

Petr Yan of Russia poses on the scale during the UFC 251 official weigh-in.

Vanessa Melo of Brazil poses on the scale during the UFC 251 official weigh-in.

Makwan Amirkhani of Finland poses on the scale during the UFC 251 official weigh-in.

Karol Rosa of Brazil poses on the scale during the UFC 251 official weigh-in.

Muslim Salikhov of Russia poses on the scale during the UFC 251 official weigh-in.

Zhalgas Zhumagulov of Kazakhstan poses on the scale during the UFC 251 official weigh-in.

Raulian Paiva of Brazil poses on the scale during the UFC 251 official weigh-in.

UFC 251, the opening event on Fight Island in Abu Dhabi, is good to go after all three title match-ups were made official at the weigh-in on Friday.

The headline clash between welterweight champion Kamaru Usman and Jorge Masvidal, confirmed only on Monday following Gilbert Burns withdrawal, tops a stacked card at Flash Forum on Sunday.

Masvidal was among the final of the 26 fighters to take to the scales, but made the 170 pounds to set up the hugely anticipated match-up with Usman. The champion, unbeaten in all 11 UFC appearances, had earlier come in on weight.

Masvidal looked mighty relieved once his number was announced, with a member of his team, stood to the side of the stage, saying it was “close”.

The pair tops the card on Sunday, with featherweight champion Alexander Volkanovski defending his title against former belt-holder Max Holloway in a rematch from their December bout. Both men weighed in at 145lbs on Friday.

Meanwhile, Jose Aldo and Petr Yan came in at 135lbs, meaning their confrontation for the vacant bantamweight crown is official.

Aldo, considered one of the all-time greats of the sport, is seeking to become a two-division champion. Yan, on the other hand, is contesting his first title bout, but has six wins from six appearances since making his UFC debut two years ago.