Ankara's efforts to talk Moscow into excluding the PYD from the congress has so far been unsuccessful, as Moscow recently said it favors the participation of all parties in the Syrian conflict.

In addition, the U.S.-Russian statement treats Syrian President al-Assad as a legitimate actor by referring to his commitment to the Geneva peace process, constitutional reform and elections.

"Turkey's no-Assad position has been dealt yet another blow," Logoglu said, noting the joint statement specifically named al-Assad as part of a political solution.

Ankara has stopped supporting rebels fighting to topple the Syrian government after it moved to mend ties with Russia last year, but top officials including Erdogan have kept targeting al-Assad by accusing his government of killing many in the war.

The opposition's repeated calls for Ankara to get in direct touch with Damascus have gone unheeded so far.

【国际英语资讯:Spotlight: Turkeys expectations frustrated by U.S.-Russian deal on Syria: analysts】相关文章：

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