Pompey endured an evening to forget as they were soundly beaten at Charlton.
A 3-0 defeat in the capital meant that Danny Cowley's side dropped one place to fifth in the League One standings.
Ryan Inniss and Eoghan O'Connell both netted from set-pieces and Corey Blackett-Taylor also netted for the Addicks, while Marlon Pack was sent off for two bookable offences.
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