Conor McGregor warned he won't be given "lamb to the slaughter" for UFC comeback

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Conor McGregor has been warned there are no worthy opponents for a warm-up fight upon his UFC return.

McGregor is looking to book his first fight since a horror leg break against Dustin Poirier last July. The Irishman recently sparred for the first time since his injury and has called for a title shot against welterweight champion Kamaru Usman later this year.

The former two-weight champion has lost three of his last four fights and has been advised to have a warm-up fight before challenging the elite at welterweight or lightweight. But MMA analyst Chael Sonnen thinks there are no easy opponents for McGregor to fight in his return.

"[The opponent in a tune-up fight] is a lamb coming to slaughter and he absolutely understands it and everybody knows it," Sonnen said. "Within the UFC that human being doesn't exist. Can we get Conor somebody out of the top ten? No, that's silly.

"He's going to be a main event, he's going to be on pay-per-view, we're going to have somebody within the top 10. Who is it at 155-pounds that you believe would be the tune-up fight? Once you realise that person doesn't exist there is no guarantee that he's gonna go out there and get good work.

"You're not bringing in an outside guy that's never been in here before, that's what they doing in boxing. In the UFC you're not coming to learn how to fight, you have well proven that you know how