The two leaders held their first meeting since Russia's invasion of Ukraine on the sidelines of a Syria summit in Tehran on July 19.

Erdogan has tried to thrust Turkey -- on good terms with both Moscow and Kyiv -- into the centre of diplomatic efforts to try and halt the five-month war.

Turkey worked with the United Nations to get the warring sides to sign a deal in Istanbul last week aimed at resuming grain shipments across the Black Sea.

Russia in turn has been concerned by Erdogan's threats to launch a new military incursion into northern Syria.

Russia and Iran have supported the Syrian government in the decade-long conflict while Turkey has backed various rebel groups.

Both Putin and Iranian leaders urged Erdogan against launching a new Syrian offensive last week.

Analysts believe that Turkey would prefer to get Russia and Iran's approval before starting a new campaign against Kurdish militants in northern Syria that Ankara views as "terrorists".