Morton and Partick Thistle played out a goalless draw at Cappielow Park as the visitors missed the chance to move level on points with second-placed Dundee.
The hosts nearly took the lead inside five minutes when Calvin Miller went through on goal to be denied by a fine challenge from Aaron Muirhead.
Robbie Muirhead came close to giving Morton the lead when he lashed a shot across goal on the hour mark which went just wide of the post.
It was a fierce match that saw 11 yellow cards handed out, but neither side were able to break the deadlock as Partick climbed one place to third and Morton stayed fifth.
Subscribe or register today to discover more from DonegalLive.ie
Buy the e-paper of the Donegal Democrat, Donegal People's Press, Donegal Post and Inish Times here for instant access to Donegal's premier news titles.
Keep up with the latest news from Donegal with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.