A storming second half display from Pompey sent them to the top of their EFL Trophy group.
John Mousinho's men ran riot after the break to beat League Two side Gillingham 5-1 at Fratton Park.
Tino Anjorin's overhead opener was cancelled out by Jonny Williams, but Ben Stevenson, Kusini Yengi, Abu Kamara and Ryley Towler all struck to secure a comfortable win.
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