There's a trend. Normally superstars from countries other than Brazil, Argentina, Spain, France, England, Italy get underrated.
Just the usual media bias. The country's media needs to have mainstream influence for global publicity. Being part of a country with a strong NT helps in winning International silverware.
Slavic/Balkan/East European athletes get underrated and overlooked all the time. In tennis, Djokovic is still fighting the politics after winning a Million Grand Slams. Says it all really.
If it was Roberto Lewandez, this forum would endlessly twerk for him.