Anthony Joshua's diet: The foods that fuel a boxing champ Apr 28, 2017 RIATH AL-SAMARRAI - Ahead of Joshua's Wembley showdown with 41-year-old Wladimir Klitschko, Sportsmail spoke to the IBF king's nutritionist Mark Ellison to learn more. Share 0 Share on Facebook Tweet Tweet on Twitter +1 +1 on Google Plus