Kell Brook has 21 days to lose six pounds before Errol Spence Jr defence

Kell Brook's weight cut is on course ahead of his world title defence against Errol Spence Jr on May 27.

Promoter Eddie Hearn posted footage of Brook weighing 10st 13lbs (153lbs) on Friday, meaning he must lose a further six pounds to make the welterweight limit (10st 7lbs / 147lbs) for his Sky Sports Box Office headline fight.

. @SpecialKBrook British Board check weigh this morning - 10st 13lbs -the Special One is in full flow for May 27.Cannot wait for this fight! pic.twitter.com/VWxF5F9DDF — Eddie Hearn (@EddieHearn) May 5, 2017

The IBF champion (36-1) has got 21 days until the official weigh-in, 24 hours prior to his defence against Spence Jr at Sheffield United's Bramall Lane.

Brook's most recent fight saw him step up two divisions (a total of 13lbs) to challenge world middleweight champion Gennady Golovkin last September. Brook lost his unbeaten record to Golovkin and also created doubt that he would ever return to welterweight, the division in which he became IBF champion by beating Shawn Porter three years ago.

But after deciding to oblige his mandatory challenger, America's unbeaten prospect Spence Jr (21-0), Brook has slowly returned to the welterweight limit and remains a realistic distance from making championship weight.

Kell Brook vs Errol Spence Jr is live on Sky Sports Box Office on May 27.