James DeGale to take on Badou Jack in Las Vegas

James DeGale, right, has not lost a fight since he was beaten by majority decision by fellow Londoner George Groves in May 2011

Britain's IBF super-middleweight champion James DeGale will fight WBC title holder Badou Jack in a unification contest on 14 January.

DeGale confirmed the fight - likely to be in New York - on Instagram, saying: "I told you it was coming!"

The Londoner, 30, became a world champion in May 2015 by beating American Andre Dirrell.

DeGale outpointed Mexico's Rogelio Medina in his most recent fight in Washington last April.

Sweden's Jack, 32, won his title by defeating Andre Dirrell's younger brother Anthony in April 2015 and he has defended the belt twice, including against Britain's George Groves.

DeGale's only defeat in his 24-fight professional career came against Groves in 2011.

Confirmation of the DeGale versus Jack fight came on the same day Northern Ireland's Carl Frampton announced his WBA world featherweight title rematch against former champion Leo Santa Cruz would take place in Las Vegas on 28 January.