Some would argue it was a foul , some wouldn't. Imo it was worse than Wards shots to Kurshers belt line. Ward and a opportunity to pounce on Kovalev like Floyd did with Ortiz but he didn't take it.
But what foul would they call it? The punch was a few inches below Kovalev's beltline: This content is protected
Ricardo Torres getting knocked unconscious by a head butt vs Kendall Holt and stopped on the follow up volley of punches