Pompey are unlikely to offer extended stays to their weekend triallists.
Defender Jerel Ifil and goalkeeper Jordan Santiago were given run outs in the 2-1 loss at Salisbury City.
Canadian keeper Santiago was released by Cardiff in the summer, while defender Ifil was at Kettering last season.
It looks unlikely either will feature in Pompey’s long-term plans, however.
Guy Whittingham thanked the pair for adding experience to the development squad at the Raymond McEnhill Stadium.
But he felt another triallist, Jack Compton, was Pompey’s stand-out performer.
Whittingham said: ‘Jerel Ifil had been at Torquay on trial and did us a great favour by playing. How much further it will go, we will have to see.
‘He gave us some experience at the back.
‘Jordan Santiago also helped us out in goal.
‘Jack Compton has been with us already and did well.
‘He was our stand-out player.’
Saturday’s loss proved a step up the learning curve for Pompey’s returning development squad.
That result followed on from two impressive wins by the first team against Bolton and AFC Wimbledon.
Whittingham explained there is a desire to express the same footballing philosophies throughout the ranks by Michael Appleton.
He said: ‘People can see at the games there’s nice football being played and the manager wants to do that.
‘We have to instil that into the youngsters as well.’
Whittingham was pleased to see Blue Square Bet South outfit Salisbury provide Pompey with a stern test.
Kieran Djilali was one of the triallists on show as he chases a deal.
Whittingham felt the game gave him a chance to build fitness.
He said: ‘Salisbury have just got themselves promoted into the Blue Square Bet South and are a strong side.
‘It was felt Kieran needed a start to get 90 minutes into his legs. It’s important for him to have that.’