The Burtonport native will take on Mitch Clarke in a lightweight clash at the Fight Night event in the MGM Grand Garden Arena.
The fight will be Duffy’s third in the UFC, and he will be looking to get back on track after suffering defeat in the last outing at the hands of Dustion Poirer in January.
Clarke has been in the UFC since 2011 and has a record of 11-3.
The fight is on the undercard of the dos Anjos vs. Alvarez contest which takes place during International Fight Week as part of the lead up to UFC 200.
With Conor McGregor not fighting on July 9th, the Irish focus will be very much on Duffy.