Played behind closed doors at the Blues’ Hilsea training ground, the fixture consisted of two 60-minute periods, with John Mousinho’s men using 22 players.
However, it was the League One Chairboys who ran out emphatic winners through goals from Garath McCleary, Richard Kone, Beryly Lubala and an unnamed player.
Mousinho was understandably angry after the final whistle – and here are our Pompey player ratings...
5. Ryley Towler - 6
(Replaced by Jamal Baptiste on 61 mins) Started alongside Conor Shaughnessy and put in a decent performance during his time on the pitch. Used the ball effectively. Photo: Jason Brown
6. Connor Ogilvie - 6
(Replaced by Tom McIntyre on 61 mins) Solid as ever, with the occasional foray down the left flank. Now faces a challenge from Jacob Farrell for the left-back slot, with Jack Sparkes having now joined Peterborough. Photo: Jason Brown
7. Marlon Pack - 7
(Replaced by Owen Moxon on 61 mins) Had an early chance when his header from a corner was directed straight at Wycombe's keeper. Kept things simple and tried to galvanise the players around him, without too much success. Photo: Gary Oakley
8. Ben Stevenson - 5
(Replaced by Tom Lowery on 61 mins) Will be one of Pompey's fringe players this season and has yet to truly change that opinion during pre-season. Keeps everything simple and barely loses possession, so an extremely reliable option. Photo: Jason Brown