Beware Dillian Whyte, Tyson Fury and Deontay Wilder, it might be the Christmas period but Anthony Joshua isn’t letting up.

The unified-heavyweight boxer was grafting hard in the gym as he prepares for a huge 2019.

AJ was lifting barbells and doing sit-ups and captioned one of his Instagram stories: ‘Bully season 2019.’

Joshua is waiting to see who will fight him in Wembley on April 13 with Whyte now the favourite after knocking out Dereck Chisora.

The 2012 Olympic medalist wants to fight Wilder but the American is likely to have a rematch with Fury.

Joshua initially praised Whyte after his victory over Chisora but started to get irritated when Whyte started to call out AJ at the O2 Arena.