This is the 6518th most frequent French word.
hurkacz
"Hurkacz" is not a French word; it is a Polish surname, most famously associated with tennis player Hubert Hurkacz.
Here, 'Hurkacz' is a proper noun, specifically a surname used to identify a person, in this case, a tennis player.
Hurkacz est un joueur de tennis polonais célèbre.
Hurkacz is a famous Polish tennis player.
In this sentence, 'Hurkacz' is used possessively to describe the serve belonging to the tennis player.
Le service de Hurkacz est très puissant et précis.
Hurkacz's serve is very powerful and precise.
This sentence uses 'Hurkacz' to refer to the person whose matches are being watched, again as a proper noun.