On March 30 in the third round at the Tier-I event in Miami, she upset 8th seeded Hantuchová 6–4, 6–7, 7–5 in an epic match. She came back after losing a match point in the second set, as well as having served for the match twice in the second set. In the third set, she was down three to none, but still managed to win. It was her first top ten win since Beijing 2006. In the next round, she lost to Zvonareva 2–6, 7–6, 0–6. In doubles, she and Srebotnik won the title, beating Akiko Morigami and Alina Jidkova 6–4, 6–3, Lucie Hradecká and Renata Voráčová 6–4, 6–3, and Davenport and Hantuchová 6–4, 3–6, They earned the title by beating Australian runners-up Azarenka and Pe'er 6–0, 6–3, and No.-1 team Black and Huber 7–5, 4–6, [10–3. It was their second team title, and Sugiyama's eighth Tier-I title.