"I hope Gylfi will stay because he's an important player for us," said Guidolin, who signed a two-year extension on Wednesday to stay at Swansea.
Superfly V usa "I'm sure other teams are interested in him. But I don't know what will happen in the future.
Achomatic Pack usa After being appointed in January when the club were only two points clear of the relegation zone, Guidolin took 24 points from his 15 matches to ensure Swansea would be spending a sixth straight season in the top flight next term.
Profiles Gylfi Sigurdsson
The 60-year-old Italian secured his future in south Wales with impressive back-to-back wins over Liverpool and West Ham, in which his side scored seven goals.
Swansea could even finish in the top half of the Premier League if they beat Manchester City at home in their final game on Sunday, and Stoke fail to take three points against West Ham.
But Guidolin insists the target next season is a simple one.
"Next season 40 points is the priority and if it's possible - play well," said Guidolin.
"It's important not to lose this, or to lose our identity.
"This season could be a lesson for the future because Swansea in the last 10 years, every year has been up, up, up.
"In football it's not always easy to go up.
"It's important to have a season that's a little bit complicated to understand and learn new things."
Guidolin has already told chairman Huw Jenkins the type of player he wants this summer, but admits the final decision rests with the club.
"I speak about the characteristics of new players, then the decision is down to the chairman and the club," said former Parma and Udinese boss Guidolin.
"The chairman deals with the money. I can say something, the chairman might have another opinion.
ace 16+1 Black usa "But there is a good communications between us, there is a relationship with the chairman.
women Superfly Mercurial usa "I'm very happy because I won my first challenge - for the club to know me.
women magista obra usa "I can say I've won the first challenge, and now I begin another moment of my life.
"I was not sure because the decision was not mine, but I'm confident in myself and results helped me in this period."