Pompey have completed the signing of goalkeeper Josh Oluwayemi.
The 21-year-old has put pen to paper on a one-year deal – with the club option of a further 12 months – after leaving Tottenham at the end of last season.
Oluwayemi trained with Pompey earlier in the summer and played the second half of the pre-season victory at Havant & Waterlooville.
Blues boss Danny Cowley said: “Josh had a great footballing education with Tottenham and has amazing athleticism.
"There is plenty of potential and he is exactly the sort of promising player that our club is looking to sign."
“He’s an incredible shot-stopper and is also good with his feet, so we’re delighted to bring him to the club.
“We’ve got Josh Griffiths and Toby Steward, and he’s another young player who our goalkeeping coach Joe Prodomo is looking forward to working with and helping to develop.
“There is plenty of potential and he is exactly the sort of promising player that our club is looking to sign.”
Oluwayemi was born in England, but has previously been called up to represent Nigeria at senior level.
He has played for Tottenham’s under-21 side in the EFL Trophy and also gained experience with a spell on loan at Maidstone.