The attacking midfielder was left out of the squad for last week's league loss to West Ham United after breaching coronavirus protocols, but he returned for Sunday's FA Cup semi-final win against Southampton.
Maddison had to settle for an appearance from the bench at Wembley, but Brendan Rodgers may consider bringing him into the starting lineup against in-form Midlands rivals Albion.
Should Pereira miss out here, as Rodgers has suggested he might, then versatile wide player Marc Albrighton may get the nod at right wing-back.
There is no doubt over Kelechi Iheanacho's inclusion for this huge match; the Nigerian international having scored the winner at Wembley on Sunday to maintain his impressive scoring streak.
In fact, Iheanacho has scored seven goals in his last five Premier League games, which is as many as he had in his previous 63 appearances in the competition.
Leicester City possible starting lineup: Schmeichel; Fofana, Evans, Soyuncu; Albrighton, Ndidi, Tielemans, Castagne; Maddison; Vardy, Iheanacho