Substitute Manolo Gabbiadini brought Southampton close to safety as they saw off Swansea 1-0 at the Liberty Stadium, confirming West Brom's relegation from the Premier League
The result means Swansea must hope they beat Stoke on Sunday and Huddersfield lose their last two games, while Southampton will be safe barring a defeat against Manchester City and a large goal swing towards Swansea
Gabbiadini grabbed the winner with 17 minutes remaining after a scramble inside the penalty area, one of few clear-cut opportunities in a nervy encounter
With so much at stake, the first half was a cagey affair, with half-chances falling to Sam Clucas and Charlie Austin inside the penalty area, but things picked up in the second
Jordan Ayew forced a wonderful fingertip save from Alex McCarthy having cut inside from the left and unleashed a fine effort from 20 yards which was bound for the top corner
Saints should have been ahead on the hour mark, but Austin's header in space eight yards out from Cedric Soares' cross was straight at Lukasz Fabianski
But on 72 minutes they did break the deadlock as sub Gabbiadini, who had been on the pitch for just five minutes, drove home from close range after Alfie Mawson had blocked Shane Long's volley on the goal line
Gabbiadini's substitution was a result of luck and a brave move by Mark Hughes, with the Italian striker replacing defender Jan Bednarek, who had concussion but did not want to be taken off
Shane Long missed a chance to wrap it up late on, hitting into the side-netting when the square pass to the unmarked Gabbiadini seemed the better option, but after a nervy finish, Mark Hughes' side held on
After largely spectating in the first half, McCarthy was called into action early in the second, producing a world-class save from Jordan Ayew's dipping volley
The 28-year-old, who replaced Fraser Forster as Saints' first-choice goalkeeper earlier this season, also commanded his area superbly, particularly late on as Swans peppered the box
: "At the end of the game we had the feeling that we deserved a little more, a minimum of one point
 But we played to win
 Now we are in the position where we rely on others but we are not relegated yet
: "I have to say, to a man, they've worked their socks off, every single day, every single game
 Some games we've had things go against us and have had to pick ourselves up, but I thought we were immense today, we weren't going to be denied
"Swansea host Stoke on Sunday in their final Premier League game, while Southampton welcome champions Manchester City to St Mary's
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