Frank Warren believes the British fight fans have lost interest in the boxing career of Amir Khan (31-4, 19 KOs).

Last week, Khan announced that he signed a three fight promotional deal with Eddie Hearn of Matchroom.

Khan's first fight in two years has been scheduled to take place on April 21 at the Echo Arena in Liverpool. The Bolton boxer has been out of the ring since May of 2016, when he moved up to a catch-weight of 155-pounds to challenge then WBC middleweight champion Saul "Canelo" Alvarez.

Khan was knocked out in the sixth round of the contest, and not long after he underwent a series of surgeries to correct a hand injury.

Before Khan signed a deal with Hearn, he spoke with several other promoters - including Warren, who promoted the first half of Khan's career.

Warren offered him a fight with Bradley Skeete and never heard from Khan again.

At the moment, Khan does not have a finalized opponent for the date - but Warren does not expect him to face anyone of worth.

"He came to us and asked if we were interested and they said they had the fight with [Manny] Pacquiao," Warren told Nick Parkinson.

"I offered him to fight Bradley Skeete, and he didn't come back. He got badly knocked out in his last fight and people have lost interest. I know he's been in the jungle but that's not fighting.

"Realistically we will see what he has got left in his next fight. They said they are looking for a tough opponent, so they should fight Bradley Skeete. But I know they won't."

Warren is still very upset that Khan's return has been booked for the exact date of big featherweight showdown between Carl Frampton and Nonito Donaire - which takes place in Belfast.

The conflict will create a scenario where fans will have to choose between watching Frampton-Donaire on BT Sport and Khan's return on rival network Sky Sports.

"It's ridiculous they are having Amir's fight on the same night as Carl Frampton in Belfast. But our fight is a real fight between two quality operators but Khan will be fighting a stiff," Warren said.