Pompey boosted their chances of reaching the EFL Trophy knockout stages with a convincing win over Gillingham.
The 5-1 success at Fratton Park took them above their opponents to the top of Southern Group E.
John Mousinho's side went in level at the break after Tino Anjorin's opener was cancelled out by Jonny Williams.
But Ben Stevenson, Kusini Yengi, Abu Kamara and Ryley Towler all stuck in the second half to stun the Gills.