Anthony Joshua weighed in at a career-heaviest for his eagerly anticipated showdown against Wladimir Klitschko on Saturday.

The Briton tipped the scales at 250-pounds ahead of facing Klitschko for two versions of the world heavyweight title in front of 90,000 spectators at London's Wembley Stadium.

Joshua, 27, was ten pounds heavier than Klitschko, who tipped the scales a little over 240 at Friday's weigh-in at nearby Wembley Arena, with a crowd of 2,000 watching proceedings.

Klitschko (64-4 53 KOs), 41, was five pounds lighter than he was for his previous fight 17 months ago when he lost a surprise points decision to Joshua’s fellow Briton Tyson Fury.

The Ukrainian, who was his lightest since 2009, can win back two of the three titles he lost to Fury by beating Joshua, who has stopped all 18 professional opponents since turning professional after his 2012 Olympic gold medal triumph.

Thursday saw Klitschko try to unsettle his opponent by suggesting Joshua's physique was like that of an over-muscled and immobile body-builder.

British star Amir Khan felt Joshua has looked really nervous during this fight week.

"I've been watching him train and watching his press conferences and the build-up to this fight and he seems very nervous," said the former light-welterweight world champion, speaking exclusively to talkSPORT.

"I have not really seen him be this nervous for any fight. He seems very quiet. I just hope having 90,000 people in a stadium, he is not going to be nervous, he is not going to be shocked by it and freeze."

"This is the fight that is going to show us all what Joshua is all about. I know he is fighting a guy who is maybe a little bit old, but he is still dangerous. If he wins this fight, he can be the next superstar. Boxing is known for having good heavyweights and in the last couple of years we have not really seen a good, good heavyweight."