Euron Greyjoy never displays any physical prowess in the books, relying more on sorcery and his skill as a strategist and manipulation. The show makes him a Composite Character with his brother Victarion who in the books is The Brute, and makes him a fearless raider who personally fights in the thick of the action. Most tellingly, while Victarion is something of a Dumb Muscle, Euron trades none of his cunning in exchange for this improved martial skill, instead only not displaying any talent for sorcery.
Euron is a famous and dreaded pirate. While he doesn't have any on-page fight scenes, there's no reason to suspect that he hasn't fought in countless ship-to-ship battles. His characterization between the show and the books hasn't really changed in that regard. The show just adds scenes showing it.
Removed:
Euron is a famous and dreaded pirate. While he doesn't have any on-page fight scenes, there's no reason to suspect that he hasn't fought in countless ship-to-ship battles. His characterization between the show and the books hasn't really changed in that regard. The show just adds scenes showing it.