Bernard Hopkins, the oldest champion in boxing history, is set to make a historic title defence at age 47 in a rematch against fellow American Chad Dawson on April 28 at Atlantic City.

Hopkins will defend his World Boxing Council light-heavyweight crown against Dawson in a rematch of a fight last October in Los Angeles that ended in round two when lifted Hopkins by the leg and slammed him into the canvas.

Hopkins suffered a dislocated joint connecting his left shoulder and collarbone and has yet to resume full training.

Referee Pat Russell awarded the fight to Dawson, saying no foul had been committed, but the result was overturned to no-decision at a December hearing and the WBC ordered a title rematch.

“Attn: fanz & of course HATERZ April 28 AC im getting my revenge/victory on @OfficialBadChad 4 that BS,” Hopkins posted on his Twitter page. “Haters make sure y’all watch me beat dawson once n 4 all!”

Last May, Hopkins defeated Canadian Jean Pascal by unanimous decision to take the title. The two had fought to a controversial draw in December of 2010.

Hopkins, who turned 47 last week, is 52-5 with two drawn and 32 knockouts while Dawson’s record is 30-1 with 17 knockouts.