Francesco Guidolin suffered his first defeat as Swansea boss against Southampton and admitted his side only deserved a point at best.
Shane Long headed in a second-half winner and Graziano Pelle had a goal disallowed as the visitors marched into sixth spot, leaving the Swans just three points above the drop zone
“Southampton are a strong team in a good period. They played well, with enthusiasm and calm. It’s difficult to score a goal against them at the moment. We had a few situations but we deserved only one point today,” said Guidolin.
“For the first time in my five matches here I saw my team play not very well.
“I don’t know why we did not play well. This is my first month and it is difficult to understand anything.
Swansea created little to trouble Forster and company, but they had a strong penalty shout waved away in the final minute.
Southampton substitute Maya Yoshida appeared to bundle over Alberto Paloschi in the box but referee Jonathan Moss was unmoved.
But Guidolin said: “It could be (a penalty) but I don’t speak about it.
“My culture is not to speak about the referee because his job is difficult, like my job and that of the players. That’s my culture.”