Boxing - Alvarez and Fielding set super middleweight bout for December

Boxing - Rocky Fielding vs David Brophy - British & Commonwealth Super-Middleweight Titles - Echo Arena, Liverpool, Britain - September 30, 2017 Rocky Fielding celebrates his win Action Images/Andrew Couldridge

(Reuters) - Mexico's Canelo Alvarez said on Friday he will challenge Rocky Fielding of Britain for the WBA super middleweight title on Dec. 15 at New York's Madison Square Garden.

The fight will be Alvarez's first since his September victory over Kazakhstan's Gennady Golovkin for the unified middleweight world title.

"Taking a big challenge in my career and representing the WBC as the 160 lbs champion, I will now fight for the world title for the 168 lbs vs Rocky Fielding, the current WBA champion," Alvarez wrote on Twitter.

Sep 15, 2018; Las Vegas, NV, USA; Canelo Alvarez walks back to his corner during the middleweight world championship boxing match against Gennady Golovkin (not pictured) at T-Mobile Arena. Alvarez won via majority decision. Mandatory Credit: Joe Camporeale-USA TODAY Sports

The 28-year-old Mexican will take a 50-1-2 record with 34 knockouts into the fight.

Fielding, 31, is on a six-fight winning streak that improved his record to 27-1 with 15 knockouts.

He won the WBA super middleweight title with a technical knockout of German Tyron Zeuge in July.

(Reporting by Gene Cherry in Salvo, North Carolina; Editing by Ken Ferris)