Anthony Joshua learned from his shock defeat in the first fight to secure a comprehensive and strategic victory over Andy Ruiz in Saudi Arabia and reclaim the WBO, IBF and WBA heavyweight world title belts.
It was one-paced, with few exchanges over the 12-round distance, but the focus and desire of the young British heavyweight - the 30 year-old is still young in boxing experience - cannot be doubted.
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Historically, and for the record, Joshua became only the fourth heavyweight in history to claim the belts straight back, after Floyd Patterson (1960), Muhammad Ali (1978) and Lennox Lewis (2001).
Joshua graduated from his fight with Wladimir Klitschko at Wembley Stadium with honours in one of the sporting events of the year of 2017, but the challenger in this contest at the Diriyah Arena had been forced back to school following defeat to Ruiz on June 1 in New York.