The Cardiff City stopper is said to be on West Bromwich Albion's radar.
The 30-year-old Scotland international has played 234 times for the Bluebirds and the Baggies have now allegedly made contact with his current club ahead of the new campaign.
West Brom were previously linked with Crystal Palace ‘keeper Wayne Hennessey but that has since gone quiet, suggesting Baggies boss Tony Pulis is looking elsewhere in his bid to bring in more competition for current number one Ben Foster.
The report claims that sources in the Midlands have revealed West Brom’s interest in the player, adding that Cardiff may be willing to sell even with the new Championship season just over a week away.
Marshall has previous top-flight experience but considering he has three years left on his current contract he is unlikely to come cheap.
It also remains to be seen if he would be willing to move to a club where he is not guaranteed to start regularly long term, even though Foster is currently side-lined due to injury.
West Brom have struggled so far this transfer window, bringing in only James McClean and James Chester, but there is still a month to go and it will be interesting to see if a move for Marshall does materialise in the coming days.