Ayr kept tabs on Morton among the top-four pace-setters with a valuable 1-0 win at Cappielow Park.It was fitting that a former Greenock man provided the key breakthrough. Scott McLaughlin found the top left corner after 35 minutes, pouncing on a rebound after Derek Gaston saved his initial effort.The home side contributed to a lively match, but Ayr marginally deserved the result for their defensive solidity. Declan McManus and Robbie Crawford had the best chances for the Ton, but both were wasted.Jon Scullion nearly saved the day for the home side with a late strike, but David Hutton repelled his effort.