Serena Williams defeated No. 2 ranked Anett Kontaveit in the second round of the US Open, 7-6(4), 2-6, 6-2. ✔️Subscribe to ESPN+ http://espnplus.com/youtube ✔️ Get the ESPN App: http://www.espn.com/espn/apps/espn ✔️Subscribe to ESPN on YouTube: http://es.pn/SUBSCRIBEtoYOUTUBE ✔️ Subscribe to NBA on ESPN on YouTube: http://bit.ly/SUBSCRIBEtoNBAonESPN ✔️ Watch ESPN on YouTube TV: http://es.pn/YouTubeTV