Pompey collected a point from their opening Papa John's Trophy group match at Crawley.
The contest finished 2-2, although it was the hosts who claimed a bonus point by winning the resulting shoot-out.
Pompey – who featured a fit-again Denver Hume – recovered from conceding an early penalty to lead through goals from Clark Robertson and Dane Scarlett.
But a controversial last-gasp spot-kick meant Danny Cowley's side were denied the victory.
Fans can watch the key moments (top video) or register with iFollow for extended highlights (middle video) and a full match replay (bottom video).
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