Rio a prime goal for Serena on her return to competition

By Mark Lamport-Stokes (Reuters) - Having played just one tournament since mid-September due to various injuries and a recent bout of flu, Serena Williams is now itching to get back into competition with the Rio Olympics among her top priorities for the year. The American world number one has not competed since her stunning loss to Germany's Angelique Kerber in the Australian Open final in January, and says she has learned lessons from that defeat which she will use to her advantage. "Whenever I