The Foxes crept into the top six on the final day of the regular season last weekend with a dramatic 3-2 victory at rivals Nottingham Forest.
Anthony Knockaert netted in the final minute at the City Ground to keep Leicester's promotion hopes alive.
However, it was a different story for Watford as a 2-1 defeat against Leeds saw them fail to take the final automatic promotion place in the table.
Hull City's draw against Cardiff City meant that the Hornets would have sealed their place in the Premier League with a win at Vicarage Road, but two blunders from rookie goalkeeper Jack Bonham condemned them to the lottery of the playoffs.
Watford won both matches against Leicester when the two teams met earlier in the season.
Leicester: Schmeichel; De Laet, Morgan, Keane; King, Dyer, James, Knockaert, Schlupp; Nugent, Wood
Watford: Bond; Doyley, Pudi, Cassetti, Chalobah; Ekstrand, Hogg, Anya, Abdi; Forestieri; Vydra
Sports Mole says: 1-2