Once again there’s a lot of buzz about Nate Diaz and Conor McGregor fighting for a third time. But, according to the latter, the only way the trilogy will happen, is if Diaz comes down to 155.

Now that McGregor’s blockbuster bout with Floyd Mayweather is over, there’s no shortage of talk regarding who the UFC lightweight champ will fight next. Although McGregor impressed many doubters in his stoppage loss to Mayweather, since he was defeated, the consensus is that the Irish star will return to the Octagon.

But, against who? Tony Ferguson and Kevin Lee are booked to fight on October 7th for the interim lightweight title, and Khabib Nurmagomedov’s waiting in the wings as well. But many believe none of those men can generate the type of payday, McGregor will likely be looking for.

One fighter who might be able to do that, however, is Mr. Diaz. After all, McGregor and Diaz moved a ton of PPV buys in 2016, when they fought at welterweight twice, and split the contests. Well, following McGregor’s loss to Mayweather, he was asked by the BBC about fighting Diaz. The champion set out the following condition (quote via BJ Penn.com):

“I’m the 155 pound champion. I faced him at 170, he beat me, then I rematched him at 170, I beat him. Now I’m the 155 pound world champion, now if he wants that fight, he must come down — that’s a fair trade. I didn’t ask for the rematch at a lower weight, I asked for the rematch at the exact same weight. I thought that was a fair play move on my behalf and I came in and I won. So, now I won that and I won the 155 title after that, so if he wants the fight he has to make that 155 pound limit.”

This shouldn’t come as a surprise. Even before McGregor stopped Eddie Alvarez to become the lightweight champ, he made similar comments about fighting Diaz at 155. Now the big question is whether it will happen and when.