The İstanbul Cup (also known as the TEB BNP Paribas Tennis Championship İstanbul for sponsorship reasons) was a WTA tennis tournament held in Istanbul, Turkey, organised for professional female tennis players.

Held annually since May 2005, it was played on outdoor clay courts until 2009, after which the organisers decided to switch the surface to outdoor hard courts.

It was not held in between 2011–2013, due to the WTA Tour Championships moving to Istanbul for those years.

It was played at the TTF Istanbul Tennis Center, located in the İstinye neighborhood.

This WTA Tour tennis tournament article is a stub.