Dan Butler has put pen to paper on a new two-year deal with Portsmouth.
The 18-year-old left back established himself in the first team during the second half of the season as the Fratton Park club suffered a second consecutive relegation.
Having come through the Blues academy, Butler made his debut in a League Cup defeat at Plymouth Argyle in August before a loan spell at Havant and Waterlooville in the Blue Square Bet Conference South.
Butler told the official Pompey website: "I'm very pleased. I've been away on holiday otherwise I think it would have been done even sooner.
"I got a taste of playing first team football in the second half of last season and now i'm looking forward to being involved for a whole season at this club."
Butler becomes the seventh player to commit his future to Guy Whittingham's side as they look for an immediate return to League One. The south coast club went down to the fourth tier of English football after finishing rock bottom last season.
He added: "There are a lot of new players coming, so hopefully we can have a good season, give the fans something to cheer about and bring the good times back to Pompey."
Pompey boss Whittingham is hopeful the young full-back can continue to impress after a fine debut campaign, and the teenager is likely to get plenty of chances to build on his initial efforts with the club.
He said: "It's a great one to get across the line. Dan was given a chance in the first team last season and did well.
"Now it's up to him to push on. He was given a platform and now we want him to keep improving."
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