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Serena Williams is pregnant and hasn’t played a match since January, but she’s still a champion: She moved up to the No. 1 ranking in the world this week.

Williams passed Angelique Kerber by a tiny margin and spoke to her upcoming child in a post on her Instagram account. “My Dearest Baby,” she wrote, “you gave me the strength I didn’t know I had. You taught me the true meaning of serenity and peace. I can’t wait to meet you. I…