Yeah, Duke University does provide scholarships based on merit. Here are some of them:

Duke Merit Scholarship
Minimum Criteria: Based on academic performance
Separate application needed: No

Karsh International Scholars Program
Total Worth: full tuition, room and board
Eligibility: full tuition, room and board
Minimum Criteria: Based on academic performance

Duke University provides aids at an average of 53831 per student meeting 100% of students need. 100% of students with need receive financial aid at an average of 49174 need-based grant. They also provide other scholarships including Athletic Scholarships and ROTC Scholarship.

Hello I am an international student, I study political science. I want apply for athlete scholarship