Unsurprised by his history-making win over Eddie Alvarez, UFC featherweight and lightweight champion Conor McGregor insisted no one is on his level.

McGregor was outspoken as ever in the octagon at Madison Square Garden after dethroning lightweight title holder Alvarez via a second-round knockout at UFC 205 on Saturday.

No fighter in the history of UFC had been champion in two weight divisions simultaneously until Irish star McGregor landed a lethal four-punch combination to end the main event in New York City.

And speaking afterwards, McGregor - who knocked down Alvarez on three occasions during the opening round - demanded: "Where the f*** is my second belt? I already have this one, where is the second one at? Cheap f******.

"$4billion this company was sold for… go backstage and grab that second belt."

McGregor, who improved to 21-3, continued: "They're not on my level.

"You've got to have size, reach, length. You've got to have some attributes.

"If you don't, I will rip your head off. That's what I say every time.

"Eddie is a solid competitor, a worrier but he shouldn't have been in here with me."