Shane Long's goal earned Southampton a 1-0 victory over Athletic Bilbao in their final pre-season friendly on Sunday.
The striker finished in the 43rd minute after being played in Steven Davis.
Saints will now look ahead to their Premier League opener at home to Watford next Saturday.
Claude Puel made four changes from the side that played Espanyol in midweek, with Cuco Martina, Sam McQueen, Jordy Clasie and James Ward-Prowse in the starting XI.
Athletic looked threatening in the early stages as Maya Yoshida blocked a shot from Borja Viguera, who then curled an effort wide of goal.
Nathan Redmond saw a shot saved at the other end before Long broke the deadlock, finishing well from the edge of the area shortly before half-time.
Charlie Austin and Jay Rodriguez were introduced in the second half and the former went close to making it 2-0 when he headed wide.
Virgil van Dijk also went close from a corner as Saints held out for victory.