Pompey saw off Exeter at Fratton Park to record a first league win for three months.
The 2-0 victory ensured that John Mousinho got off to the perfect start as head coach of the Blues.
Marlon Pack opened the scoring with a 25-yard volley in the second half before Joe Morrell's effort was allowed to cross the line by Jamal Blackman.
FT scenes are BACK! 🤩#Pompey pic.twitter.com/KLsvFtjNzq
— Portsmouth FC (@Pompey) January 21, 2023