Hearts v St Johnstone preview

Team news ahead of Sunday's Scottish Cup fourth-round clash between Hearts and St Johnstone at Tynecastle (2pm).

Ian Black, Darren Barr, Stephen Elliott and Gary Glen are all struggling with illness as Hearts prepare to take on St Johnstone in the Scottish Cup at Tynecastle on Sunday. All four are doubtful for the fourth-round tie, while uncertainty remains over whether goalkeeper Marian Kello (back) and Rudi Skacel (calf) will be fit to play. Scotland international Lee Wallace could make his first appearance since recovering from a knee injury after being an unused substitute in the last two games, but Andrew Driver (thigh) and Suso Santana (knee) remain out. Jamie Adams is St Johnstone's only doubt for the game at Tynecastle. Adams has an ankle knock but will be given every chance to prove his fitness ahead of the trip to Edinburgh. Long-term injured midfielder Kevin Moon has stepped up his training over the past couple of days following his recovery from a cruciate ligament injury. Hearts (from): Kello, Barr, Bouzid, Zaliukas, Stevenson, Palazuelos, Templeton, Elliot, Elliott, Balogh, Kyle, Jonsson, Mrowiec, C Thomson, Skacel, Novikovas, Wallace, Obua, J Thomson. St Johnstone (from): Enckelman, Grainger, Duberry, MacKay, Anderson, Maybury, Taylor, Davidson, Morris, Craig, Millar, MacDonald, Adams, Samuel, Parkin, Smith, Reynolds, May, Caddis.