Ryan Williams has signed for Premier League Fulham.
The 18-year-old Australian winger is a product of the Blues’ academy who played six times for the first team.
He made his debut from the bench in a 2-2 draw at Middlesbrough – coming up against older brother Rhys – on the opening day of the season.
Williams also featured as a substitute in matches against Barnet, Brighton, Hull, Leeds and Chelsea.
Blues boss Michael Appleton said: “This is a good opportunity for Ryan to move to an established Premier League outfit and we wish him all the best for the future.”
The departure of Williams was the only transfer activity involving Pompey on deadline day.