England's only fitness problem ahead of the game is with Ledley King, who will miss the game with the Tottenham defender still nursing the groin injury sustained in their opening match.
King's replacement against Algeria, Jamie Carragher, is suspended after picking up his second yellow card of the tournament, so Capello has confirmed West Ham defender Matthew Upson will take his place at the heart of defence.
Every player apart from King took part in training on Tuesday, so what happens with Capello's
selection will be the subject of intense speculation, although early rumours suggest Heskey will lose out with Jermain Defoe, who looked lively against Algeria, set to take his place.
Slovenia defender Marko Suler is likely to miss the match after sustaining a rib injury against the US and is set to be replaced by Matej Mavric at centre-back.
They will also be without midfielder Nejc Pecnik, who was a substitute against the Americans, but was flown home after breaking his ankle and is expected to be out for around three months, meaning he will miss the remainder of the finals.
Whether Kek will make further changes to his side will remain to be seen, but with Slovenia only needing a point, the 48-year-old may choose a side to set their stall out to defend against an England team desperate to prove they can handle the pressure.