The UFC launches its Fight Island series with a world title triple-header tonight as the promotion descends on Abu Dhabi.

In the first of four shows over two weeks, tonight's card will be headlined by welterweight champion Kamaru Usman against Jorge Masvidal.

Usman was due to take on Gilbert Burns but the No.1 ranked contender tested positive for coronavirus last week and was replaced at just six days' notice.

Earlier in the evening, Max Holloway and Alexander Volkanovski will meet again to crown the featherweight champion while Peter Yan and Jose Aldo will clash for the vacant bantamweight strap.

Here, we ask former UFC star and current analyst Dan Hardy for his view on the three fights at the top of the bill...

Kamaru Usman vs Jorge Masvidal

If Jorge Masvidal wins tonight it will make him the biggest star in the UFC; he's already a powerful player in the sport, probably more so than a lot of the champions already.

That's about the anticipation of people wanting to see him fight, that's where the strength and power comes from.

If you look at it like a deck of cards, the champions represent the kings but you also have the aces and they can sit above or below the kings; Conor McGregor is an ace and Masvidal is an ace.

It's very rare for someone to be as powerful, if not more powerful, than the champions and I think that's what we have here with Masvidal coming in against Usman who is holding the belt but really it's Masvidal everyone is tuning in for.

There was talk of him taking this fight initially but he resisted and stood his ground to get more money and it paid off; now they need him and I'm sure he's demanded a hefty purse for stepping in there on short notice.

I'm sure he's been preparing because one loss, even here against the champion, it does impact his brand and his value.

He won't have taken a fight he's not ready for and the amount of time he has been training, the skills he will need in this fight he will have had for 10 years.

It's just a case of being able to put them together and make it count on the night. A lot of that is down to conditioning and I think he's aware of that at this stage of his career.

I believe he can win; Usman is an excellent fighter but his game is fundamentally basic, there is nothing complex about his striking. I don't feel there is a real understanding of setting traps when it comes to his striking.

His best work is when he can get his hands on his opponent; his wrestling is impressive and his conditioning is impressive so if he is able to pressure Masvidal for the first two rounds I do think he might be able to find some cracks in Masvidal's conditioning.

But at the same time he will be aware that any time he is not in physical contact, he's in danger.

If he can fight to his strengths he can beat everyone in the division, but Masvidal is a real test for him.

Alexander Volkanovski vs Max Holloway

I feel Alexander Volkanovski played his ace card in the first fight, I think Max Holloway expected him to go for takedowns and to work his top game and his ground and pound.

Volkanovski came in with the surprise factor and was able to keep Holloway out of his game by not doing what he was expected to.

For Holloway, he's had five rounds to study Volkanovski and normally he only needs one round to figure out a way to beat them so I'm expecting Holloway to come in with an intensity where he wants to start fast and get ahead on the cards early.

Max Holloway and Alexander Volkanovski clash for a second time

I think Volkanovski might switch the script and work the clinch and takedowns on Holloway to keep him out of his comfort zone again.

It's a very tough test for both guys but if they both bring their A-game to the table then I think Volkanovski wins but Holloway definitely has the ability to rack up points and to beat him over the distance.

He just has to be an uncharacteristically fast starter and that's very difficult for him.

Peter Yan vs Jose Aldo

I'm a big fan of Jose Aldo and when he said he was moving down to bantamweight I was nervous for him. I always felt his struggle was the featherweight limit and that he would move up to lightweight.

So when he moved to bantamweight and was taking on Marlon Moraes U was quite nervous and during the first round it seemed my fears were confirmed but in the second and third rounds he looked very good.

I'm sure that has boosted his confidence and if he comes in with his A-game and brings his low kicks, I think he can win the championship.

I don't see any reason why Aldo can't beat Peter Yan, he just has to be the best version of the vintage Aldo he can be; it's about feints and low kicks and not being susceptible to Yan's pressure,

Peter Yan takes on Jose Aldo for the bantamweight title

Yan is 15 fights into this career but he's had 300 boxing matches, he's had Thai boxing matches and amateur MMA matches so his experience is not shown on his record.

He fights as though he is always planning something and that makes his opponents nervous. If he pressures Aldo in the first round it might leave him exposed but a calm and collected Aldo is a problem for anyone.

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Coverage of UFC 251 starts from 10.30pm tonight on BT Sport 1.