Fifth seed Li Na from China only needed 57 minutes on Sunday to outscore No. 9 seed Jelena Jankovic to book a berth in the U.S. Open last eight.
It was an overwhelming match. Li had lost to Jankovic in their last three meetings, but she won all her seven break points and outscored the former world No. 1 20-7 on winners.
Li entered the match with perfect form, winning three straight games to establish a 3-0 lead. Jankovic managed to break in the fourth game, pulling back the score to 2-3. Li shrugged off the pressure in the sixth game, breaking back to extend the advantage to 4-2. Though Jankovic finished another break afterwards, Li let go no chance in other games, finishing the first set 6-3.
Jankovic hardly had chance to win a game in the second set, losing six straight games.
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