Cape Town - Former Wales international footballer Danny Gabbidon has weighed in on the prospect of Swansea losing the services of their captain, Ashley Williams.
The 31-year-old has recently been linked with a move away from the Welsh outfit, with Everton reportedly interested in signing the Wales captain.
Gabbidon, who previously played alongside Williams for the national team, suggested that the centre-back is near-irreplacable.
"Williams is a worrying one, he would be hard to replace," he told BBC Sport.
"He's about to turn 32 - time is running out for him a little bit and he probably deserves to play at a higher level and test himself against the best in Europe."
Williams is set to resume training this week following an extended break after the 2016 European Championship in France, where he led Chris Coleman's side to their first-ever semi-final in a major tournament.
The former Stockport County man has made over 300 appearances for Swansea in his eight-year stay at the club.
Media reports suggest that Ronald Koeman is keen on luring Williams to the Toffees as a replacement for John Stones, who has attracted interest from Barcelona, Chelsea and Manchester City.