"It was the fatigue that got him, not the shots" - Abel Sanchez

If you go all out to get your opponent out of there and deplete your energy reserves in the process so and your opponent takes everything you throw at them and then turns the heat up on you and gets you out of there you gambled on them not being able to withstand your attack and it backfired. That's boxing and that's winning

Moses opted to gamble on that because just like how he said he would Hrgovic had dragged him into the deep waters and desperation had set in and he knew he was getting drowned very soon. He knew that. He felt it to his soul. His power and speed were no match for Hrgovic's chin, heart and will and he got drowned.