LONDON — Mikkel Kessler’s super-middleweight rematch against Carl Froch will take place in London in May. In their 2010 fight, Kessler (46-2, 35KOs) won a unanimous points decision in his native Denmark. The new title bout was announced Friday and it will take place at London’s O2 Arena on May 25. The 33-year-old Kessler is the WBA champion and has won 46 of his 48 fights – 35 by knockout. Froch (30-2, 22 KO) holds the IBF belt, which the British fighter took off Lucien Bute in May 2011.