text: Ten-man Southampton lifted the Premier League U21 Cup, but they needed extra time, and a brilliant winner, to see off a stubborn Blackburn side. The game was settled shortly before the break in the additional half hour, when Sam Gallagher unleashed a wonder-strike from long-range, after the two-legged tie had ended 1-1 after 180 minutes. Gallagher, who made 18 Premier League appearances for the club last season, but has not been in the first team this time around, smashed a left-footed shot into the bottom corner from 25 yards, giving Blackburn keeper David Raya no chance, after cutting in from the right wing and playing a one-two with Josh Sims. Southampton celebrate after winning the U21 Premier League Cup at St Mary's on Monday night . Sam Gallagher celebrates after his stunning strike won the game for Southampton against Blackburn . The Saints players mob goalscorer Ryan Seager after he converted a chance to put them ahead . Earlier, striker Ryan Seager had put Saints ahead with a tidy finish after the ball fell fortuitously to him in the Blackburn box, but the unfortunate Matt Targett turned the ball into his own net to level the game. Targett is the latest of a string of promising left backs to emerge from the club's academy and get a chance in the first team, but he could do nothing when a deflected cross struck him on the head and trickled past Paulo Gazzaniga. Southampton were reduced to 10 men late on in normal time, when midfielder Harrison Reed, who had been superb in the goalless first leg, was dismissed for a second bookable offence. But the hosts held on for extra time in front of 12,000 fans at St Mary's, and the home faithful were rewarded with a winning goal of the highest quality. Southampton keeper Paulo Gazzaniga watches as a header loops over his crossbar, as 10-man Saints held on . Home manager Ronald Koeman watched on from the stands as his youth side lifted the trophy .
target: Southampton beat Blackburn in final of Premier League U21 Cup .
  Sam Gallagher netted long-range strike to win the tie for 10-man Saints .
  Matt Targett own goal had levelled up Ryan Seager opener in normal time .
  Over 12,000 fans turned up to watch Saints win the cup at St Mary's .