Swansea City boss Francesco Guidolin was left frustrated with defeat at home to Southampton.

Swansea remain three points above the relegation zone following their first defeat under Francesco Guidolin.

Shane Long's ninth goal of the season ended Swansea's four-game unbeaten run, and the Italian head coach expressed his disappointment over the performance.

"For the first time in my five matches here I saw my team play not very well," Guidolin said.

"I don't know why we did not play well. This is my first month and it is difficult to understand anything.

"I think we can do better but Southampton are a good team and are difficult in some situations.

"They are playing well in this period with five victories and six clean sheets and score against a lot of teams, not just us."