British welterweight Amir Khan has insisted that Kell Brook needs to "up his game" to be considered for a huge domestic showdown between the two in the future.
Khan's failure to secure an encounter with Floyd Mayweather resulted in Brook's promoter Eddie Hearn offering the former light-welterweight world champion $5m (£3m) to face the IBF mandatory challenger, but Khan has hinted that he has rejected Hearn's advances.
The 27-year-old told BBC Radio 5 live: "He has to up his game a little bit to get that fight.
"In America, no-one really knows Kell and the biggest boxing market is in America. In the United Kingdom, it would be a huge fight but at the moment, he is not on my radar."
Khan hopes to announce news of his next opponent within the next 14 days with a return to the ring expected in early May.
