West Bromwich Albion have therefore joined Bolton Wanderers and Fulham along with the Swans as looking at the £5m rated defender.
Brendan Rodgers is thought to have targetted Bertrand as the ideal replacement for Neil Taylor who seems certain to desert the Swans and join Newcastle United.
Woves are also reported to be watching events at Stamford Bridge although all now seems to be on hold following Chelsea's appointment of their new manager.