WTA roundup: Elise Mertens upsets Simona Halep in Madrid

No. 13 seed Elise Mertens rallied from a break down in each of the final two sets to eliminate No. 3 seed Simona Halep 4-6, 7-5, 7-5 and advance to the quarterfinals of the Mutua Madrid Open on Tuesday. Mertens, of Belgium, needed two hours and 34 minutes to defeat...