Former light heavyweight titleholders Chad Dawson and Adrian Diaconu have agreed to terms and will meet on May 21, Dawson promoter Gary Shaw told ESPN.com on Wednesday. The scheduled 12-round bout will air on HBO as the opening bout on the card headlined by the rematch between light heavyweight champion Jean Pascal and former champ Bernard Hopkins. Shaw said that he and Diaconu's co-promoter Yvon Michel had struck a deal and that he was awaiting the signed contract. "This is no walkover fight for Chad," Shaw said. "Diaconu is a tough fighter, a good fighter. But Chad is with a new trainer now in Emanuel Steward and I think that will make a big difference in Chad's fight game and his strategy. I think you'll see a whole new Chad, a guy that can finish off his opponent." Read more: http://sports.espn.go.com/sports/boxing/news/story?id=6198989