David Haye weighed-in at a leaner 15st 10lbs for Saturday's rematch with Tony Bellew at London's O2 Arena.
For last year's unexpected defeat he tipped the scales at 16st 9oz. Bellew was 15st, when he had previously been 15st 3lbs.
IBF bantamweight title challenger Paul Butler was earlier overweight for his fight with Emmanuel Rodriguez.
He was given a further two hours to make the 118lb weight limit and therefore remain eligible to win the vacant title but failed to do it in time.
But who else is on the undercard? Here's all you need to know.
The main event
Tony Bellew and David Haye face each other in the headline fight at the O2 Arena tonight, with the ring walk likely to take place at around 10pm BST.
Bellew defeated an injured Haye during last year's first bout, but the pair go at it again later tonight. You can watch the fight on Sky Sports Box Office - head here for more details.
Undercard fights
- Jordan Gill vs Carl McDonald - featherweight
- Kody Davies vs Przemyslaw Gorgon - light-heavyweight
- Luke Campbell vs Troy James - welterweight
- Martin Joseph Ward vs James Tennyson - European and WBA International Super-Featherweight Championship
- Joshua Buatsi vs Stephane Cuevas - light-heavyweight contest
- Lenroy Thomas vs Joe Joyce - Commonwealth heavyweight title
- Paul Butler vs Emmanuel Rodriguez - IBF World Bantamweight Championship
- John Ryder vs Jamie Cox - super-middleweight contest
Latest news
IBF bantamweight title challenger Paul Butler described himself as "gutted" and "heartbroken" after failing to make the weight for his fight with Emmanuel Rodriguez.
Butler, who fights on the under-card of the David Haye-Tony Bellew bout at London's O2 Arena on Saturday, weighed in over the 118lb limit and, despite being given a further two hours to make the weight, was unable to do so.
He is therefore not eligible to win the vacant title.
Butler said on Twitter: "First of all I know failing weight in my biggest fight to date looks unprofessional and I understand the stick I'm getting believe me I'm gutted and heart broken I can't win that world title tomorrow, but I didn't fail it without trying I'd never do that."