MIAMI, March 31 — American Danielle Collins upset the odds to win the Miami Open title yesterday, beating Elena Rybakina of Kazakhstan 7-5, 6-3 to claim her first WTA 1000 title in her final season on the tour.

The 30-year-old Collins, number 53 in the world, is the lowest-ranked woman ever to win the tournament, clinching her biggest career title in a two-hour triumph.