Ellis is convinced Banyana Banyana made a statement on Monday night, but insisted it will not be easy against Senegal in the last eight.
"This WAFCON is not just a one-sided tournament where you can predict an outcome," the 62-year-old continued.
"The games are so tight, and it’s one moment of magic or one moment of madness or even a mistake by someone, and then that’s it. This shows how tight the games are, so we have to be on top of our game against Senegal. They showed against Zambia and Morocco, where they had very tight games, but tonight was a statement and showed what we can do, and we’ve got to do even better."