Khan sets heart on Rees showdown
Amir Khan is desperate for Gavin Rees to beat Andreas Kotelnik in Cardiff on Saturday - so he can challenge for the Welshman's WBA light-welterweight belt.
Rees recently claimed he would give 21-year-old Khan "a pasting" if they ever met in the ring.
"I've never wanted someone to win a fight so much before," said Khan, the Commonwealth lightweight champion.
"I want to be a world champion before the end of the year, and Rees is a realistic target."
Khan, who faces Denmark's Martin Kristjansen in a WBO lightweight title eliminator at the Bolton Arena on 5 April, added: "I badly want Rees to win so I can shut him up once and for all.