Shane Mosley Canelo Alvarez, Manny PacquiaoFloyd Mayweather and Oscar De La Hoyanaming one man the toughest opponent he’s ever faced.

Like most world-class boxers, Mosley—who himself is no slouch— He has faced several elite knockout artists during his 60-fight career.

Back in 2011, “Sugar” clashed with then-WBO welterweight world champion Pacquiao, who was considered one of the most ferocious boxers in the sport at the time.

Their encounter ultimately resulted in Mosley losing via unanimous decision, although the American still displayed his remarkable endurance and survival instincts.

Prior to that in 2007, Mosley found himself on the wrong end of another unanimous decision, this time against Miguel CottoAt 147 pounds, he was once again considered a particularly tough customer.

Despite losing to some of the top fighters, Mosley also managed to neutralize explosive attacks from several other opponents.

For example, the former three-division world champion had two victories against De La Hoya and Fernando Vargas.

A similar story happened in 2009 when Mosley faced another powerful boxer, Antonio Margarito, and eventually defeated his opponent in stoppage time in the ninth round.

However, according to the Hall of Famer, it was Vernon Forrest, a boxer who defeated him twice in 2002, who ultimately provided the most power to his strikes.

during an interview ring magazine, Mosley revealed that Forrest’s natural strength was what caused him the most problems in their two fights.

“I don’t know why; maybe it’s natural. (Forrest) just got hit the hardest.”

Forrest is a two-weight world champion at welterweight and super welterweight, with 41 career wins in 45 fights, 29 of which were knockouts.