Bulgarians would certainly credit the Russians, and so probably would the Serbs. Also remember who stopped them at Vienna.
The Greeks still credit the Orthodox Russians to one extent or another. They do not credit the Western secular, Latin or protestant powers. Stopping the Mohammedan Turks at Vienna didn’t save the Balkans from centuries under the heel of the Ottomans, but the sack of Constantinople by the 4th Crusade absolutely assured the fall of The City two centuries later and centuries of oppression to this very day.