Swansea manager Bob Bradley has described star midfielder Gylfi Sigurdsson as "a vital part" of the Welsh club's setup as the January transfer window looms.
The Iceland playmaker is in his second spell with the Swans, and such is the 27-year-old's imperious form, that Bradley accepts other clubs will be looking at him.
Sigurdsson's market value is likely to be £20 million or more, but Bradley has underlined his importance ahead of Wednesday's Premier League clash against West Brom at The Hawthorns.
"Gylfi has been terrific for us," Bradley said.
"I am sure there are many clubs that are taking notice.