The pair were amongst those absent for Thursday’s 6-1 defeat at home to Tottenham and, if neither recover in time, Christian Fuchs is likely to continue in the centre of defence alongside Yohan Benalouane.
Despite training on Friday, Andy King may also be unavailable having limped off last weekend at Manchester City, with Daniel Amartey expected to feature in central midfield.
The Foxes also have a doubt over striker Shinji Okazaki, while midfielders Danny Drinkwater and Nampalys Mendy and defender Molla Wague are long-term absentees.
Leicester will be eyeing revenge on the Cherries on Sunday, having gone down 1-0 at the Vitality earlier in the season courtesy of a goal from Marc Pugh.
Provisional squad: Schmeichel, Hamer, Zieler, Simpson, Fuchs, Chilwell, Wasilewski, Moore, Knight, Benalouane, Ndidi, King, Amartey, Gray, Albrighton, Mahrez, Musa, Vardy, Ulloa, Slimani, Okazaki.
Hibernian head coach Neil Lennon claimed referee John Beaton failed to protect his players from 'disgraceful' challenges during a 1-1 draw with St Johnstone.
St Johnstone manager Tommy Wright has accused Neil McCann of deflection tactics as he denied reporting the Dundee boss to the Scottish Football Association.