Scotland keeper David Marshall has admitted that he and his teammates let their supporters down following their 2-0 loss to Serbia.

A brace from Filip Duricic was enough to condemn Gordon Strachan's side to their fourth defeat of their World Cup qualifying campaign.

Marshall told BBC Sport: "We haven't won a game in the group; we've disappointed ourselves and let down the fans."

Scotland are bottom of Group A and have collected just two points in their six qualifying matches.