Boxing Challenge: Joshua Dropped, Tsyzu retires Spence

      No upsets over the weekend, but the biggest news came from a near-upset as unknown Kristian Prenga dropped former heavyweight champion Anthony Joshua twice in the first round before Joshua would return the favor by stopping Prenga in the second.

Joshua's next opponent, Tyson Fury, won his warm-up fight over veteran Mariusz Wach when Wach was unable to answer the bell for the eighth round.

Fury and Joshua are scheduled to meet sometime in the fall.

In Australia, former junior middleweight champion Tim Tszyu won a unanimous decision over comebacking former welterweight champion Errol Spence.

Spence announced his retirement after the fight.

Former junior middleweight and middleweight champion Demetrius Andrade won his ring return with a first-round KO of Douglas Ataide.

Josh Kelly retained his IBF junior middleweight title with a unanimous decision over Caoimhin Agyarko, and Hamzah Sheeraz kept his WBO super middleweight title with a unanimous decision over Simon Zachenhuber in two boring fights on the Joshua-Prenga undercard.

Edgar Berlanga stopped Steven Butler in seven rounds in the Zuffa main event from New York City.

Richardson Hitchins won a unanimous decision over Ricardo Salas, and Jalil Hackett earned a unanimous decision over Sergey Dereyvanchenko in the supporting bouts.

Boxing Challenge

TRS: 85 Pts (13)

Ramon Malpica: 70 Pts (10)

Vince Samano: 58 Pts (12)