Roberto Firmino scored twice himself to level the scores .
It appeared as though the momentum was with the home side until Gylfi Sigurdsson 's goal on the counter-attack in the 74th minute earned Swansea a crucial three points that moves them off the bottom of the table .
Roberto Firmino scored twice himself to level the scores and it appeared as though the momentum was with the home side until Gylfi Sigurdsson 's goal on the counter-attack in the 74th minute earned Swansea a crucial three points that moves them off the bottom of the table .