WATCH LIVE: Wozniacki wins opening set vs. Mertens in Aus Open semis (ESPN): livio acerbo on lacer2k and greengroundit WATCH LIVE: Wozniacki wins opening set vs. Mertens in Aus Open semis (ESPN): livio acerbo on lacer2k and greengroundit Gennaio 25, 2018 January 25, 2018 at 04:58AM from ESPN via http://espn.go.com/