Joe Calzaghe vs. Peter Manfredo Jr., billed as Pride Under Pressure, was a professional boxing match contested on 7 April 2007, for the WBO and The Ring super middleweight championship.

Calzaghe vacated the IBF title he won against Lacy, instead of facing mandatory challenger, Robert Stieglitz, in order to make a voluntary defence against Manfredo.

[3] On 27 November 2006, it was announced that Calzaghe and Manfredo would fight on 3 March 2007 at Millennium Stadium in Cardiff, live on ITV Sport and HBO.

[6] In the opening two rounds, Calzaghe landed scoring shots and quick combinations, with Manfredo boxing at range defensively and attempting to counterpunch.

Calzaghe defeated Kessler on 3 November, by unanimous decision to unify the WBA, WBC, WBO, and The Ring titles.