The Republic of Ireland international has been enhancing his reputation as a sound defender this summer at the European Championships in France, starting games against Italy and France.
Against Italy in particular, the 6ft 4ich man struck up a superb partnership alongside fellow Championship defender Richard Keogh which managed to keep a clean sheet against a top opposition.
Duffy’s performances have evidently been noticed by a number of observers, and now odds are available on him making a move to as many as 11 clubs with two of those in the Premier League.
As per the Bookmakers BetVictor, Swansea are the favourites to sign him with odds of 1/2 while Scottish Premiership champions Celtic are listed as second favourites with odds of 5/2.
The Swans will be looking to bolster their squad this summer as they seek a top half Premier League spot this coming season, and boss Francesco Guidolin may feel going British is the best way.
A centre-back partnership between Wales skipper Ashley Williams and the towering Irelan man could be of particular promise, and the odds suggest that it’s more likely to happen than not.
That said, Celtic have been linked with Duffy already this summer and a recent report in the Daily Mail claimed the Hoops have enquired about him and are willing to pay £2 million for his services.
Newly-appointed Celtic boss Brendan Rodgers will be hoping to use his influence to bolster his side with the addition of players south of the border, and a new defender is arguably needed at Celtic Park.
Rovers, however, will be keen to hold on to both Duffy and Grant Hanley this summer as new manager Owen Coyle looks to build a squad at Ewood Park capable of challenging for promotion.