Carles Perez' double helped Barcelona conclude their pre-season tour of Japan with a 2-0 victory over Vissel Kobe.
The 21-year-old winger continued his impressive pre-season form, coming off the bench twice to net in the second half and ensure the Catalans' trip to the Far East ended with a victory.
Keen to bounce back from the 2-1 defeat to Chelsea in Saitama on Tuesday, Valverde made five changes to his starting XI to keep his squad fresh ahead of the new season.
Without Lionel Messi or Luis Suarez, who are on holiday after the Copa America, the Spanish coach deployed a makeshift front three of £107m man Antoine Griezmann, Riqui Puig and Alex Collado.
Facing former Barca trio Andres Iniesta, David Villa and Sergi Samper in Japan, it was never going to be a stroll in the park for the LaLiga champions.
But despite dominating possession for the majority of the first half, the Blaugrana couldn't find a way past Vissel Kobe goalkeeper Daiya Maekawa.
Repeating his tactics against Chelsea, Valverde changed his entire XI at the break with Frenkie De Jong among those who came on.
The changes paid dividends in the 59th minute when Perez exchanged a neat one-two with Brazilian winger Malcom and coolly slotted under the goalkeeper from inside the box.
The Barca B forward staked his claim for a first-team spot for the forthcoming season when he doubled his tally, drilling home from a tight angle to seal a comfortable win.
