Resurgent Wozniacki downs Niculescu to reach last 16

Sep 2, 2016; New York, NY, USA; Caroline Wozniacki of Denmark hits a shot to Monica Niculescu of Romania on day five of the 2016 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

NEW YORK (Reuters) - Former world number one Caroline Wozniacki continued her resurgence at the U.S. Open with a commanding 6-3 6-1 win over Romania's Monica Niculescu on Friday to reach the fourth round.

The Dane, a U.S. Open finalist in 2009 and 2014 but unseeded this year after being sidelined for two months by an ankle injury, dominated from the start and wrapped up victory in just under an hour and a half.