The technique of his volley was flawless , making it five league goals for the season , two for Barnsley , three for Swansea .
Federico Fernandez headed back across and Mawson , a centre half , finished like a striker .
The technique of Federico Fernandez 's volley was flawless , making it five league goals for the season , two for Barnsley , three for Swansea .
Federico Fernandez headed back across and Mawson , a centre half , finished like a striker .