Jack Whatmough has been added to the England under-19 training camp ahead of the Euro Championship qualifiers.
The 17-year-old will be part of boss Noel Blake’s squad of 23 in the build-up to the Euro Elite qualifying round later this month.
The group will meet at St George’s Park from May 13-15, before a squad of 18 is named to face Montenegro on May 24 at Walsall’s Bescot Stadium.
The Young Lions must also do battle with Ukraine and Scotland on home soil, as they aim for a place in July’s Euro Championship Finals in Hungary.
Whatmough had initially been on stand-by, yet has now been elevated to the full group following his impressive end to the season with Pompey.
Striker James Wilson, who netted twice on his Manchester United debut on Tuesday against Hull, is among those also present in a squad inevitably dominated by Premier League players.
There are also four representatives from Southampton including Petersfield’s Calum Chambers and striker Sam Gallagher, who netted a hat-trick against Whatmough’s Academy side in the FA Youth Cup in December.
Following the training camp, the squad will meet up again at St George’s Park on Sunday, May 18, to finalise their preparations for the qualifiers.
Following the opening game with Montenegro, England will face Scotland on May 26 and Ukraine on May 29, with both matches at Burton Albion’s Pirrelli Stadium.
Whatmough made his England debut in an under-18 fixture against Croatia in March, the match ending in a 2-1 defeat.
Last month he had to pull out of adding to his cap following a call-up against Germany, having sustained a slight knee injury with the Blues.
The Gosport youngster has made 12 appearances this season, with Andy Awford presenting him with his debut in a 2-1 home loss to Southend in November.
Meanwhile, Pompey have been named among the winners of the Football League Family Excellence Award for 2014.
The accolade recognises the outstanding experience provided by clubs for young fans and families.
And a total of 47 clubs from across all three divisions of the Football League have been given this year’s award for 2014 by the judging panel.
Shaun Harvey, Football League chief executive, said: ‘The Family Excellence Award gives clubs a standard to aspire to when planning their efforts to attract more families and young fans to their matches.
‘It is hugely encouraging to see so many clubs receiving the accolade, demonstrating the Football League’s ongoing commitment to securing the next generation of fans’.