Anthony Joshua shows off ripped physique and asks 'who's next'?

New IBF heavyweight champion Anthony Joshua who defeated 'Prince' Charles Martin in the second round to win the IBF heavyweight title last week, is already back in the gym and showed off his fine physique on Instagram last night.The British boxer asked 'who's next?' as he prepares to defend his IBF title in his next fight. He captioned his post :

''No time to wait. Only time to prepare. Who's next? #AJBoxing''