Eidur Gudjohnsen believes his former Iceland team-mate Gylfi Sigurdsson could be tempted to leave Swansea if a big club comes in for him this summer.
Sigurdsson's future has been the subject of fierce scrutiny after a season in which he was one of the most effective performers in the Premier League.
The 27-year-old scored nine goals and had 13 assists as he helped Swansea avoid dropping out of the top flight.
Swansea are determined to hold on to their prize asset, but Everton and Tottenham have both been strongly linked with Sigurdsson.