Billie Jean King Cup Picks - Scheduled Dates.With the ATP & WTA Tours offering an extensive schedule you can expect to see the best free daily tennis tips from OLBG's tipsters throughout the year. When will you have Tennis betting picks ? The four slam events starting with the Australian Open in January and weekly ATP Tour and WTA Tour events are the most popular with tipsters and tennis bettors alike as these events are usually streamed live on main TV network and sports channels so our tipsters will have you covered with their tennis selections on all the big tournaments throughout the year. OLBG's army of tennis tipsters provide free tennis picks on the main ATP Tour and WTA Tour events which includes the four major slams plus there are tips for the lower tier tours including the Challenger Men's and Challenger Women events and the Billie Jean King Cup (Ladies) and ATP Cup (Men's) team events.