Villa sweat on Heskey fitness

Aston Villa striker Emile Heskey is a doubt for the home Barclays Premier League match with leaders Chelsea due to shin and calf problems.With Gabriel Agbonlahor still sidelined after undergoing groin surgery a fortnight ago John Carew is set to get the nod up front if Heskey fails a fitness test.Forward options Fabian Delph (knee) and Andreas Weimann (ankle) remain on the sidelines while defender Curtis Davies starts a one-month loan at npower Championship side Leicester.