Manchester City boss Sven Goran Eriksson is frantically searching for a new goalkeeper.
When asked if Hart would start at Upton Park, Eriksson replied: "If you wait until this afternoon, or tomorrow morning, I will tell you.
"We are working on solutions here, so I'm not quite sure about it today.
"We have only two goalkeepers in this moment. We know Isaksson is away for around six weeks, so maybe it's something we have to do."