Brandon Haunstrup toasted Pompey’s second-half performance after they battled from behind to defeat Tottenham Hotspur under-21s in the Checkatrade Trophy.
The Blues clinched a 3-2 victory at Fratton Park and finished top of Southern Group A with nine points.
Andre Green netted his first goal for Kenny Jackett’s side on his return following a two-month absence after undergoing knee surgery.
Substitutes Gareth Evans and Oli Hawkins were also on target for the hosts.
Spurs were a well-drilled unit who passed the ball well from the back and put the home side under pressure during periods of the clash.
Haunstrup, who made his seventh appearance of the season in a left-back role, felt playing a Premier League youth set-up proved a different challenge for the Blues.
And the academy graduate was delighted with how Pompey fought from a goal down at half-time to deliver a success.
Haunstrup said: 'They were a good side.
'It was a different test coming up against a side like that.
‘I think that it's good for us, trying to adapt to it.
'In the second half, I felt like we did the job well.’
Pompey’s victory ensured they finished with maximum points in Southern Group A.
The Blues also delivered a 4-0 win over Gillingham and a 1-0 success at Crawley.
It means Jackett’s troops are guaranteed a tie at Fratton Park in the second round of the competition, which will take place next month.
Spurs also advanced into the last 32 of the competition, despite suffering a loss on the south coast. Gillingham were 2-1 winners over Crawley.
Although the Checkatrade Trophy is much-maligned by large sections of the Fratton faithful, Haunstrup insisted Jackett’s troops are aiming to progress as far as possible in the competition.
The academy product said: ‘We've got a home tie for the next knockout game now.
'We want to get on with it and we will try to progress as far as we can in this tournament.’