"unrivalled level of" is correct and usable in written English.
You can use it to describe something that is better than anything else or that is without equal. For example: "This product offers an unrivalled level of quality and reliability."
Among Afghan provincial governors, he enjoys an unrivalled degree of autonomy.
As a consequence, saffron has frequently been associated with an unrivalled degree of adulteration.
Some medical schools allow students to design their own modules (within the boundaries of the curriculum), permitting an unrivalled degree of student ownership over learning.
Offering this level of unrivalled flexibility creates challenges: I have had to become an expert on fashion and cosmetics as well as home goods, because my clients can and will redeem the value of their gift list anywhere in our store.
"As North Koreans, you've come to expect a level of mercurial brutality unrivalled by any other country on the planet," the statement continued.
Outside of the US police the level of fear and paranoia as a black American is unrivalled here and that is what Samuel L Jackson meant.
In the four years of Pep Guardiola's short but unrivalled era as its coach, Barcelona accumulated 14 of the 19 trophies open to it at the highest level of soccer.
Furthermore, it is shown that the proposed (multi- iris fuzzy vault schemulti- irisunrivalled security levels in comparison to fuzzy vaultschemes obtainer biometric characteristics.
With its unrivalled antiquity, out-of-this-world cuisine and stupendous scenery, china has infinite potential for adventure.
"The fee structure is a reflection of the extraordinarily high levels of staff contact hours that the students will benefit from, the unrivalled access to industry that they will receive, the almost bespoke nature of each student's learning experience with us and the enormous financial investment that Condé Nast is putting into the project," she said.
