ISTANBUL Oct 28 Four candidate cities - Kazan, Russia; Mexico City; Singapore and Tianjin, China - are bidding to host the WTA Championships from 2014 and beyond, the WTA said on Sunday.
The tournament's three-year contract with Istanbul runs out next year.
The winning city will be announced in the spring of 2013. (Reporting by Matt Cronin, Editing by Justin Palmer)
Our top photos from the last 24 hours.