West Ham, on the other hand, have seen a marked improvement since David Moyes was reinstated as manager, taking four points from their last three Premier League matches.
Leicester were the closest challengers to runaway league leaders Liverpool for much of this season, but a run of four defeats in their last six Premier League matches has seen Brendan Rodgers' side fall into third position.
Defeats in their last two matches to sides in the bottom half will have been particularly worrying for the former Liverpool boss, with Jamie Vardy missing a penalty in their most recent loss to Burnley on Sunday.
Leicester remain six points clear of Chelsea in fourth place and 11 points clear of Manchester United in fifth, so a win at home to the Hammers would be the perfect way to re-emphasise their top-four credentials.
West Ham's trajectory in recent weeks has been better than that of Leicester, with Moyes's arrival allowing the club to look past their previous run of nine defeats in 13 Premier League fixtures.
The East London club remain just a point above the relegation zone and know a defeat at Leicester could see them looking over their shoulders once again.
However, West Ham have tended to fare better on the road than they have at the London Stadium this season, with the majority of their points coming away from Stratford.
Leicester City Premier League form: LLWWLL
Leicester City form (all competitions): WWWDLL
West Ham United Premier League form: WLLWLD
West Ham United form (all competitions): LLWWLD
Leicester will still be without the impressive Wilfred Ndidi, for whom this match will likely come a week early.
A player that could have acted as an able deputy, Daniel Amartey, continues his long road to recovery following the broken ankle he sustained against West Ham in October 2018.
The Ghana international has been back in for surgery this month and remains a way off a full return.
Leicester City possible starting lineup:
Schmeichel; Pereira, Evans, Soyuncu, Fuchs; Mendy, Tielemans, Maddison; Perez, Vardy, Barnes
West Ham United possible starting lineup:
Randolph; Zabaleta, Diop, Ogbonna, Cresswell; Snodgrass, Rice, Noble, Fornals, Lanzini; Haller
We say: Leicester City 1-1 West Ham United
This game sees two sides face off at a crucial point in their seasons, with both clubs looking over their shoulders at the chasing pack. West Ham have seen improvements since Moyes arrived and this can be expected to continue on Wednesday, with the Hammers taking a point home from the Midlands.