Joe Gallen saluted Pompey’s powerful second-half display which earned them a third-successive Checkatrade Trophy win.
Having entered the interval trailing to Phoenix Patterson’s goal, the Blues responded to run out 3-2 winners against Spurs under-21s.
Andre Green and substitutes Gareth Evans and Oli Hawkins all netted to complete the fightback, while Harvey White claimed a late Tottenham consolation.
And Pompey’s assistant manager was delighted with the players’ half-time response.
Gallen said: ‘In the first half we didn’t put in a poor performance, but in the second half we were a bit more like ourselves.
‘We were a lot more dynamic, put a lot more crosses into the box, there were a lot more chances – the pace and the power of our team came through in the end.
‘At the interval, Kenny (Jackett) was speaking a lot about closing the opposition down.
‘Tottenham play out from the back constantly, taking risks, that’s their style, we thought we could get about them a little bit more and stamp our authority on them more.
‘We were really concentrating on closing them down and pressing, but also producing goalscoring football.
‘That is where the ball travels forward, we get hold of it, we are setting play up, getting the ball wide, getting it into the box early, getting three or four players in-between the posts.
‘Goalscoring football and dynamic football is what we were looking for.
‘In the second half we were dynamic, forward passing, putting quality into the box, runners were going in there, and we had a lot of chances.
‘We looked more like ourselves.’
Victory means Pompey have now topped their group, with a maximum return from their three fixtures.
Gillingham defeated Crawley 3-2.
And, being group winners, Kenny Jackett’s men will be handed a home tie in Friday’s draw for the knock-out stages.
Gallen added: ‘We were aware of that and it’s important to us as well.
‘It’s a great place to play football and also there’s a lot of travelling for away games – and Rochdale away in the cup now as well.’
‘It‘s nice to be at home.’