Most recent example of Stamina issues coming to back you is Yarde against Kovalev.
Boy only went 7 twice against lesser competition. So once the 9th or 10th rolled around he was Toast. First L getting essentially stopped by a Jab
Yarde fight also shows the importance of pacing yourself, timing and placement of the punches even when you have someone hurt. Ward, E, Alvarez 1st fight and Canelo blasted Kovalev out of there by placing those punches perfectly and not just swinging for the fences once he was hurt but Yarde? .... That shyt was so disappointing to watch. A young fighter just blowing the opportunity like that.