Debutant Adrian Segecic was the hero, netting 38 minutes into his debut, having following up with a left-footed shot after Colby Bishop one-on-one was stopped.
The Australian, along with man-of-the-match Callum Lang, were absolute pests with their energy and drive throughout to stretch the home defence.
Pompey were challenged defensively late on – and always with Oxford’s long throws – but they stood firm to claim victory. And here are our playing ratings...
13. Adrian SegeÄciÄa of Portsmouth scores their first goal during the EFL Sky Bet Championship match between Oxford United and Portsmouth at the Kassam Stadium, Oxford, England on 9 August 2025.
Adrian Segecic opens the scoring against Oxford United. Picture: Alun Roberts/ProSportsImages Photo: Alun Roberts
15. Adrian Segecic of Portsmouth celebrates scoring their first goal during the EFL Sky Bet Championship match between Oxford United and Portsmouth at the Kassam Stadium, Oxford, England on 9 August 2025.
Adrian Segicic opens the scoring for Pompey against Oxford United. Picture: Alun Roberts/ProSportsImages Photo: Alun Roberts
16. Yang Minhyeok - 5
(Replaced Florian Bianchini on 66 mins) A few flashes of skill and quick feet, yet physically couldn't quite make an impact. Photo: Portsmouth FC