Yet, for Turkey, Russia remains a valuable tool to try and put pressure on the United States. Ankara rejects US support for the SDF, as it also empowers the YPG along the northeastern border. Turkey has sought to use Moscow to signal to the United States that it has options, beyond the US-Turkish alliance and, by extension, Turkish reliance on NATO for its security. The events in Syria clearly contradict this. Russia is not an ally of Turkey. Instead, Russia is using all the means at its disposal to shape the opposition to serves its end goals of a negotiated settlement on its own terms—goals at odds with Turkish interests.
Source
http://www.atlanticcouncil.org/blogs/syriasource/how-russia-beat-turkey-in-syria
