JEDDAH: Briton Anthony Joshua is fighting for his career on Saturday against Ukrainian Oleksandr Usyk, who can boost the morale of his compatriots in war-torn Ukraine by retaining his world heavyweight belts in Saudi Arabia. Joshua, 32, has much on the line as he strives to become a three-time world champion and perhaps spark fellow Briton Tyson Fury into performing another U-turn on retiring and set up a blockbuster unifying title bout. Back-to-back defeats by Usyk, who outboxed him in London last September, would be a career-crippling setback for the 2012 Olympics super heavyweight gold medallist who also crashed to a surprise TKO against Andy Ruiz Jr in 2019. Usyk, the undefeated former cruiserweight world champion, won on an unanimous decision in only his third professional fight as a heavyweight.