Aston Villa goalkeeper Emi Martinez is quite the hero at the club right now after his heroics in Europe helped Villa through in midweek. Martinez once again came up trumps in a penalty shootout as he repeated his heroics from the World Cup to help Villa into the semi-finals. For Martinez, who has become something of a cult figure at the club since signing, his rise is quite the two fingers up at former club Arsenal, who never quite put faith in him. However, there is always a danger with a player like Martinez that other clubs come knocking on the door. And fuelling those potential flames a ti…