Christian M'billi-Assomo Hallier vs. Sergiy Vyacheslavovich Derevyanchenko - Round by Round.

Maybe what I said was an overstatement, still... I've seen refs warn corners for coaching too much, and some commentators explain why the corner got warned. Although most refs don't care. I did a search and some AI bot came back with this...

In professional boxing matches, it is generally not allowed for boxers to receive coaching or verbal instructions from their corner during the rounds of the match. The rules of most major professional boxing organizations, such as the World Boxing Association (WBA), World Boxing Council (WBC), International Boxing Federation (IBF), and others, prohibit cornermen or trainers from communicating with the boxer during the rounds.

The rationale is that boxing matches should be a test of the boxers' individual skills, strategy, and performance in the ring without outside intervention. Allowing coaching during the rounds could potentially give one boxer an unfair advantage over their opponent. Boxers are expected to implement their own gameplans and make split-second decisions independently without real-time guidance from their corner.

However, there are exceptions and some flexibility regarding coaching during the breaks between rounds. Boxers are typically allowed to receive advice, instructions, and treatments from their cornermen during the 1-minute rest periods between each round. This allows the boxer's team to provide feedback, make adjustments, and prepare the boxer for the next round. But direct coaching during the active rounds is generally prohibited in professional boxing.