Unified world heavyweight champion Anthony Joshua is scheduled to take on Andy Ruiz Jr at Madison Square Garden on Saturday night in what will be the British fighter's first appearance on American soil in the paid ranks.

Joshua had been due to take on New York resident Jarrell Miller in his own backyard, but Miller's three failed drugs tests resulted in Ruiz Jr accepting an offer to step in at a month's notice.

Ruiz gave a good account of himself when facing Joseph Parker for the WBO title back in December 2016, but much has been made of the size disparity in comparison to Joshua ahead of their showdown at the weekend.

Here, Sports Mole takes a look at how the pair measure up against one another as Joshua puts his IBF, IBO, WBA and WBO belts on the line.

Birthplace Watford, England

Age 29

Record 22-0 (21 KO'S)

Height 6'6

Last fight weight 245lbs

Reach 208cm

Debut October 5, 2013.

Nickname AJ

Birthplace Imperial Valley, California

Age 29

Record 32-1 (21 KO'S)

Height 6'2

Last fight weight 262lbs

Reach 188cm

Debut March 28, 2009.

Nickname The Destroyer

Sports Mole has partnered with JD Sports to offer in-depth coverage of Anthony Joshua's US debut against Andy Ruiz Jr.