Club captain Stefan Johansen is a doubt for the visit of Swansea and will be assessed prior to kick off. Central midfielder Luke Amos and centre forward Charlie Austin are both potential options that Mark Warburton could recall for this midweek encounter. Swansea boss Russell Martin could hand a first league start to attacking midfielder Hannes Wolf after the German impressed from the bench against Preston at the weekend. The visitors have no confirmed absentees for the trip to London.