Charlie Austin snatched a stoppage-time winner from the penalty spot as Southampton beat 10-man West Ham United. Austin sent Joe Hart the wrong way as Mauricio Pellegrino clinched his first win as Southampton manager in dramatic crescendo. After going two goals behind, Javier Hernández had rolled back the years with two poachers finishes to very nearly get the Hammers off the hook. Southampton had sailed into a two-goal lead, thanks to Manolo Gabbiadini and a Dusan Tadic penalty, before West…