This is the 6902nd most frequent Spanish word.
deulofeu
"Deulofeu" is not a Spanish word; it is a surname.
In this case, 'de Deulofeu' indicates 'of Deulofeu', referring to the match associated with him.
Hablamos mucho sobre el partido de Deulofeu ayer.
We talked a lot about Deulofeu's match yesterday.
Used as a proper noun denoting the player's name.
Deulofeu es un talentoso jugador de fútbol.
Deulofeu is a talented football player.
Here, 'Deulofeu' is used as a possessive to describe the subject of the goal.