The visitor, who last recorded an away victory early in December as it saw off Panetolikos 1-0, could have closed the gap on the top two further, but sits six points behind second-placed Olympiacos, whichtrail leader PAOK Salonika by one point.
Elsewhere, Skoda Xanthi moved up to fifth, while Panthrakikos remains third-bottom after the two sides also recorded a goalless stalemate.