Multiple world champion Manny Pacquiao has agreed to fight Britain's Olympic silver medallist Amir Khan on April 23, both boxers said on Sunday.

The 38-year-old Pacquiao had said four days ago that he and Khan's management were in discussions for the fight, despite an earlier announcement the Filipino's next bout would be against Australia's Jeff Horn in Brisbane.

Pacquiao, however, had said that Horn was one of many possible opponents.

Negotiations between team Pacquiao and team Khan have come to terms for the April 23 bout as this is what the fans wanted. #PacquiaoKhan

— Manny Pacquiao (@mannypacquiao) February 26, 2017

The 30-year-old Khan, who won silver as a lightweight at the Athens Olympics, has not fought since last May when he moved up two weight classes to fight middleweight Canelo Alvarez.

The much bigger Mexican proved too powerful and the Briton was knocked out in the sixth round and he is likely to drop back to welterweight to fight Pacquiao, who holds the World Boxing Organisation title at the weight.

Pacquiao won the WBO welterweight title last November against American Jessie Vargas in Las Vegas with an unanimous decision.

My team an I have agreed terms with Manny Pacquiao and his team for a super fight #pacquiaokhan #April23rd

— Amir Khan (@amirkingkhan) February 26, 2017

No venue for the fight was announced.