The 2020 İstanbul Cup (also known as the TEB BNP Paribas Tennis Championship İstanbul for sponsorship reasons) was a tennis tournament played on outdoor clay courts.

It was the 13th edition of the İstanbul Cup, and part of the WTA International tournaments of the 2020 WTA Tour.

It took place in Istanbul, Turkey, from 8 through 13 September 2020.

[1] The following players received wildcards into the singles main draw: The following players received entry using a protected ranking into the singles main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: The following pair received entry as alternates: