Well, the truth is that we've seen situations like this many times in the past.
When a fighter takes their first L, it has many a time led to finger pointing within the camp and a lot of friction.
Guys feel that they've gotten as far as their current head trainer can take them.
There are relatively low numbers of "ride or die" relationships between trainers and usually even those involve a family element.
Think the Mayweathers, the Santa Cruzes, the Lomachenkos and even Andre Ward, who for all intents and purposes considers Virgil his father given that Frank Ward passed on.
In other cases, we have in many cases seen trainers getting switched up, and this may be no different.
Maybe Kovalev will be a better overall fighter if he has a Russian trainer. Who knows ?