West Ham ensured their bid for automatic promotion to the English Premier League will go to the final day of the season after coming from behind to win 2-1 away to Leicester on Monday.
The Hammers had to take all three points at the Walkers Stadium otherwise Southampton would have been assured of the second and final automatic promotion spot behind already crowned Championship winners Reading.
Leicester led when Ben Marshall's cross was headed home by Jermaine Beckford in the 34th minute but five minutes later Winston Reid equalised from Matty Taylor's centre.
Jack Collison settled the match in West Ham's favour with a 25-yard shot shortly before the hour mark.
West Ham are two points behind the Saints going into Saturday's final day.
The London club need to beat Hull City on the final day and hope Southampton lose to relegated Coventry.
If the Saints draw, West Ham would need to win by three or four goals - depending on how many Southampton score - to clinch promotion.
Teams that finish third, fourth, fifth and sixth in the regular Championship season will then enter the playoffs, which culminate in a Wembley final for the prize of the third and last promotion place in the lucrative Premier League.
West Ham are looking to bounce straight back to the top flight following their relegation at the end of the 2010/11 season while it is seven years since south coast side Southampton last played in the Premier League.