Iako američki Stejt department nije dao nikakvog službenog odgovora, grčki mediji masovno izvještavaju o neslužbenim komentarima u kojima se govori o nelagodi. Mnogi eksperti smatraju da Južni tok ima potencijal cementiranja ruske dominacije nad opskrbom zapadne Evrope prirodnim gasom preko Grčke.
Although the US State Department gave no official response, Greek media have widely reported off-the record comments, which suggest unease Many experts believe South Stream has the potential to cement Russian dominance over natural gas supplies by transferring it to Western Europe via Greece.