Diane Parry vs Elise Mertens — F — Monterrey Open

Second-seeded Mertens went into the Monterrey final with the betting market 61 percent behind her, and lost to an opponent who had already beaten her at Cincinnati two weeks earlier. The serve cracked at once: broken in game 2 for 2-0, one hold from two service games, and 0 for 4 on second-serve points. Parry, ranked 66th, gave up nothing on her own delivery, holding all three times and taking 12 of her 14 first-serve points. The 23-year-old Frenchwoman, 122nd when the season began, leaves with the first title of her career after a week that took in Tauson and Li, and 2-0 in their meetings on record.