The PowerShares Series, the North American tennis circuit for champion tennis players over the age of 30, announced the dates and full players fields for events in Lincoln, Nebraska, and in Los Angeles. Native Nebraskan Andy Roddick headlines the event in Lincoln on October 6 at Pinnacle Bank Arena where he will be joined by John McEnroe, James Blake, and Jim Courier. Roddick and Blake will also compete in Los Angeles at the Sherwood Country Club in Thousand Oaks, Calif., on October 22 along with Michael Chang and Mardy Fish. Tickets for Lincoln go on sale July 31 at 10 am CT at www.PowerSharesSeries.com.