Sigurdsson will be facing the club he left in the summer for the first time at Goodison Park and Clement, the Swans head coach, believes the Icelander's form is on the rise since the arrival of Sam Allardyce as Everton manager.
“I think Gylfi’s performances have picked up for Everton recently," Clement, whose side are bottom of the table, told Swansea’s official website. "He suffered a little bit with the team early on.
“He is a threat but they have a lot of other good players like [Wayne] Rooney and [Aaron] Lennon, who is back in the team. They also have some good young players, so we expect a difficult game.”