Southampton won promotion back to the Premier League by beating Leeds United 1-0 in the Championship playoff final at Wembley Stadium on Sunday, earning an immediate return to England’s top tier in a game considered the richest in world football.

Adam Armstrong was the match-winner as his first-half goal was enough to see off a Leeds side that struggled to muster a meaningful response, with substitute Daniel James coming closest when his shot hit the bar late in the second half.

Southampton join Championship winners Leicester City and runners-up Ipswich Town in the Premier League next season, the latter promoted after a 22-year absence from the top flight, while the Foxes, like Saints, went up at the first attempt.

Southampton got the decisive goal after 24 minutes when Armstrong latched onto a through ball by Will Smallbone and slid it past keeper Illan Meslier for his 24th goal of the season.

Promotion means Saints are set to receive a windfall of at least US$178 million, according to analysis from Deloitte’s Sports Business Group.

The rewards on offer resulted in a cagey affair with a lack of clear chances and Southampton would have been pleased to see Leeds substitute Italy winger Wilfried Gnonto and Championship Player of the Year Crysencio Summerville in the second half.

Nine minutes of stoppage time gave Daniel Farke's trailing Yorkshire side hope and they huffed and puffed but failed to break down the excellent Saints defence. (Reuters)