NEW YORK - Kim Clijsters put a quick end to Ana Ivanovic's run at the U.S. Open, winning her 18th straight match at Flushing Meadows with a 6-2, 6-1 wipeout of the former world No. 1 in their fourth-round match Sunday.

Ivanovic, who fell to as low as No. 65 after an injury-plagued couple of years, has gotten back to No. 40 and was trying to move higher.

She won three matches at the U.S. Open and was getting her biggest test -- and opportunity -- against the second-seeded defending champion.

It wasn't much of a contest.

After regaining an early break to pull to within 3-2 in the first, Ivanovic got overpowered, losing seven straight games to turn the match into a rout.