PARIS—Thinking of her late coach the whole time, Barbora Krejcikova went from unseeded to Grand Slam champion at the French Open. Putting aside a shaky set, Krejcikova won just her fifth major tournament as a singles player by beating 31st-seeded Anastasia Pavlyuchenkova 6–1, 2–6, 6–4 in the final at Roland Garros on Saturday. When it…