Joana Amorim Cortez dos Santos (born 11 January 1979) is a former professional Brazilian tennis player.

In her career, Cortez won seven singles and 26 doubles titles on the ITF Women's Circuit.

Cortez represented Brazil at the 2000 Summer Olympics in women's doubles, reaching the second round with Vanessa Menga.

A year previously, the pair won gold at the 1999 Pan American Games.

Cortez played and lost two doubles matches in major events, at the 2001 US Open and in 2002 in Australia.