Southampton's new era began with a 2-1 friendly defeat at Bournemouth.
The Saints were taken over in midweek but were unable to get the better of the League Two side at Dean Court, with all three goals coming in a frantic eight-minute spell shortly after half-time.
Matt Patterson drilled the Saints into a 51st-minute lead after good work from Gregorz Rasiak, only for Liam Feeney to level matters five minutes later.
And Sammy Igoe helped Cherries boss Eddie Howe celebrate his new contract with a win when he rolled the ball into an empty net with 31 minutes remaining.
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