LOS ANGELES -- Barcelona coach Ernesto Valverde is hopeful this week's signing of Malcom will not be the last deal the club makes before the new season kicks off next month. Malcom, 21, arrived from Bordeaux for €41 million, becoming Barca's third signing of the summer after Arthur Melo and Clement Lenglet. However, the La Liga champions are still working on the transfer of another central midfielder, with Paris Saint-Germain's Adrien Rabiot a target, and Valverde admits the squad still needs strengthening. "We're open to any possibility," Valverde said at a news conference at UCLA, where Barca trained on Friday before this weekend's International Champions Cup game against Tottenham at the Rose Bowl. "It's true that we've had some big departures in midfield [Andres Iniesta and Paulinho], so it's likely that we will make more signings. "We will try to build the most competitive squad possible, keeping in mind the fact that Andres and Paulinho have left."