Serena Williams defeated Monica Niculescu 7-5 7-5 in the Indian Wells round of 64 on hard. The upset overturned the form book — Monica Niculescu came in defending last year's round of 64.
Williams S. took it in straight sets.
Williams S. and Niculescu M. faced 6 of the same opponents in the last 12 months. Williams S. went 6–3 (67%) against them, Niculescu M. 4–3 (57%). Results against comparable opponents are close (3 : 1 better-results split).
Serena Williams beat Monica Niculescu 7-5 7-5. Umpiry, "Serena Williams vs Monica Niculescu — Indian Wells Round of 64", https://umpiry.com/match/2015-03-09/niculescu-vs-williams-indian-wells-r64?utm_source=cite (as of 9 March 2015).