Saints’ trip to the table-topping Foxes will now take place on Sunday 3rd April, instead of Saturday 2nd April, and will be shown live on Sky Sports.
The game against Claudio Ranieri’s men at King Power Stadium will get under way at 1.30pm BST.
Manchester City’s visit to St Mary’s has been put back 24 hours and will also be shown live on Sky Sports.
Ronald Koeman’s side were set to face City on Saturday 30th April, but the game will now take place on Sunday 1st May with a kick-off time of 4pm BST.
Should Manchester City progress to the semi-finals of the UEFA Champions League, Saints’ clash with Manuel Pellegrini’s side may need to be rearranged.