Undefeated WBO junior welterweight champion Chris Algieri is in top form for Saturday's fight with Manny Pacquiao. The HBO Pay-Per-View main event takes place at the Venetian in Macau, China. Algieri challenges Pacquiao for the WBO welterweight championship at a catch-weight of 144-pounds. Pacquiao's trainer, Freddie Roach, recently predicted that Pacquiao would end in Algieri, by knockout, in the very first round of their fight. Photos by Mikey Williams/Top Rank.