Merton’s top cop will be entering the ring tonight to take on a former world heavyweight champion.
Detective Chief Superintendent Darren Williams will be squaring up against two-times World Heavyweight Boxing Champion, "Terrible" Tim Witherspoon in a charity bout in support of The Royal Marsden Cancer Charity.
The Night of Champions will take place tonight at Wellington Barracks in central London.
He said: "I am incredibly honoured to be given the opportunity to get in the ring with Tim Witherspoon - a two-time World Heavyweight Champion.
"I have been training for this for four months and so physically I think I am ready but every so often a bell rings in my head."
Tim Witherspoon said: "I am going to hit Darren Williams with everything I've got and put a sign over his eyes that says "closed for the weekend"
"But the main purpose of this event is to raise money for cancer."
For more information about the charity visit royalmarsden.org To donate please visit justgiving.com/Darren-Williams4