The race for Middlesbrough defender Rhys Williams is heating up.

The Daily Mail says the Australian international - a centre-back who can also play at full-back or in midfield - has been linked with a £1.5million switch to Swansea City but no deal has yet been done with the Barclays Premier League club.

Celtic are monitoring the situation and are ready to launch a rival offer for the highly-rated 25-year-old - if the financial package is right.