A late goal by substitute Kris Doolan gave Partick Thistle victory at Morton.
Thistle took the lead six minute before the interval, David Rowson firing into the top corner from the edge of the penalty area.
Another long-range effort, this time by Morton's Darren McGeouch, levelled the scores on 53 minutes.
Home goalkeeper Dominic Cervi denied Aaron Sinclair on the hour but Doolan converted from close range from a Sinclair cross to win it for the visitors in the 88th minute.
Morton: Cervi, Evans, Graham, Smyth, O'Ware, Fitzharris (Bachirou 56), McGeouch, Derek Young (Tidser 67), O'Brien, Weatherson, Jackson (Campbell 71). Subs Not Used: Stewart, Di Giacomo.
Goals: McGeouch 53.
Partick: Fox, O'Donnell, Balatoni, Archibald, Sinclair, Paton, Cairney, Hutton, Rowson, Elliot (Doolan 82), Craig Dargo (Erskine 73). Subs Not Used: Scully, Stewart, Bannigan.
Goals: Rowson 39, Doolan 88.
Ref: John McKendrick