Swansea manager Brendan Rodgers hailed a fourth straight clean sheet as the Swans claimed a 2-0 win over an improving Leicester.
Debutant Marvin Emnes came off the bench to break the deadlock five minutes after half-time before Scott Sinclair secured the three points, tapping in an Emnes cross from close range in stoppage time.
Swansea have not conceded a goal since late September and have let just one in in seven npower Championship games at home this season.
Rodgers said: "We were well worthy of that win today and we now have four clean sheets in a row. We have a real desire not to concede goals and I think we've added a bit of excitement and flair at the other end of the pitch.
"Our intensity and our pressure was really good and allowed us to get the ball back quickly. I was very, very proud with the performance because Leicester are a good team with an international class manager.
"In the first half Leicester were playing deep in defence and I just sensed we needed to change things."