To gain the Eternal Mangekyo Sharingan, it said that the eyes of a close relative are needed. In the case of Madara Uchiha, fans know that he gained the eyes of his brother, Izuna. Sasuke also ...

Sarada is the daughter of Sasuke Uchiha and Sakura Haruno ... before acquiring the Eternal Mangekyo Sharingan, Izuna’s strength and abilities were on par with his brother.

But, in the grand scheme of things, a mere Mangekyo Sharingan will not let her reach the level of Sasuke Uchiha ever. This is why Sarada must go down the way that Sasuke did, and attain a Rinnegan.