Dimitris Salpingidis's second half strike against Latvia allowed Greece to keep pace with Bosnia at the top of Group G.
Greece joined Bosnia and Herzegovina at the top of World Cup qualifying Group G with a hard-fought win in Vaduz.
Lazaros Christodoulopoulos headed the only goal as Greece stayed in the hunt for first place in Group G and a place in next year's World Cup.
Edin Dzeko scored twice as Bosnia-Herzegovina brushed aside Greece 3-1 in tonight's top-of-the-table clash in Zenica.
Bosnia host Greece in World Cup qualifying Group G on Friday, as Liechtenstein meet Latvia and Slovakia face Lithuania.