Sergio Busquets hopes "competitive animal" Gavi can play a big part in a successful era for Barcelona after he starred in a 3-1 Supercopa de Espana final defeat of Real Madrid.
The 18-year-old attacking midfielder scored the opening goal in Riyadh on Sunday before setting up Robert Lewandowski for the second late in the first half.
Gavi also laid one on a plate for Pedri in the second half of the El Clasico showdown at the King Fahd Stadium, where Xavi celebrated winning his first major trophy as Barca head coach.
Teenager Gavi was outstanding in the Blaugrana's record-extending 14th Supercopa triumph, causing the lacklustre European and LaLiga champions all sorts of problems.
Barca captain Busquets hailed the young Spain international and thinks he can make a big impact for the Catalan giants for years to come.
Busquets told Movista: "He [Gavi] is a competitive animal, at that age the players are in the youth team or in the subsidiary and he has played at an incredible level, scoring goals and giving assists.
"I would tell him to keep learning and listening. Hopefully he will mark an era at Barca."
Barca lead Los Blancos by three points in the LaLiga title and laid down a marker by outclassing them to take the first domestic trophy of the season.
Busquets added: "We couldn't miss this opportunity to win a title after a period of changes in coaches and players.
"We had hope and ambition, but at Barca you always demand to win and Xavi has reminded us of that."