Carl Frampton will challenge Kiko Martinez for his IBF super-bantamweight title in September.
The Northern Ireland fighter beat Martinez last February, stopping him in the ninth round to win the European belt.
But Martinez has since bounced back from that reverse to win the world crown, beating Jhonatan Romero in Atlantic City in September.
The Spaniard has also defended his title against Jeffrey Mathebula and Hozumi Hasegawa, stopping both rivals to take his record to 31-4 and taking his knockout number to 23.
Frampton earned his shot at challenging Martinez with a win over Hugo Cazares in April, stopping him in the second round of their eliminator at the Odyssey Arena in Belfast.
A venue and precise date for the clash is yet to be announced.