Anthony Joshua has issued a warning to Joseph Parker, declaring he's already "leaps and bounds" ahead with training compared to his preparations for Wladimir Klitschko.

WBO champion Parker fights IBF and WBA champ Joshua in a world heavyweight unification bout in Cardiff on March 21.

Both fighters have started their camps and Joshua is determined to be lighter for Parker than he was against Takam when he weighed a career‑high 115kg.

He claims his current weight is 111.5kg and he is working on new ways to make sure he doesn't add weight in the leadup to the fight, something that has plagued him in the past.

Parker is in Las Vegas with his trainer Kevin Barry, similarly promising to produce the best camp of his 24‑fight professional career.

Like Joshua, Parker is looking to reduce his fighting weight for this clash, hoping to be around 107kg again, rather than the 111kg he fought at in his laboured title defences against Razvan Cojanu and Hughie Fury.

Source: Stuff