ANKARA (Reuters) - Turkish President Tayyip Erdogan will visit Russia s Sochi on November 13, followed by a visit to Kuwait the following day, his office said on Monday. The visit to Sochi comes amid reports of potential sticking points in Turkey s planned purchase of a Russian S-400 surface-to-air missile system, and Turkish objections to the attendance of Syrian Kurdish groups to a Russian-sponsored Syrian peace congress scheduled for Nov. 18. Last week, the two countries took a step toward the solution of an import crisis as Russia lifted restrictions on import of Turkish tomatoes. 