Billy Sharp staked an early claim in pre-season after firing a hat-trick in a 4-1 win over Swiss side Etoile Carouge.
Saints overturned a half-time deficit as they opened up their summer tour with a resounding victory against the Geneva-based side.
It was Sharp, one of nine substitutes for Nigel Adkins ’ team at the break, who stole the show with an impressive treble.
But his performance last night will have done his chances of winning a place in the team no harm at all.
Saints fell behind in the 38th minute, as Jos Hooiveld headed a cross into his own net.
But, following a mass of half-time changes, they were soon back level, as teenage star Luke Shaw, playing in an advanced role, curled in a right foot shot nine minutes after the restart.
Sharp put Saints in front with 20 minutes left, converting James Ward-Prowse’s free-kick from the left.
He added another with a smart finish six minutes later, before completing his hat-trick as he slid home after collecting Calum Chambers’ pass late on.
Saints: Davis (Forecast 46), Butterfield (Richardson 46), Fonte (Stephens 46), Hooiveld (Seaborne 46), Fox (Harding 46), Schneiderlin (Hammond 46), Ward-Prowse, Lallana (Chambers 46), Puncheon (Chaplow 67), Guly (Shaw 46), Lambert (Sharp 46).