Arsenal Under-18s ended a run of three straight victories with a disappointing 3-0 reverse at the hands of Southampton on Tuesday.
Joe Curtis delivered an early blow inside the first two minutes of the game, before Ryan Seagar doubled the hosts' advantage just seven minutes later.
Jason Dodds' side completed their victory with the last kick of the game when Jake Sinclair fired home after a brilliant run from the halfway line.
Next up for Bould's side is a clash against Derby County in the FA Youth Cup next Wednesday.
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