http://www.beckett.com/news/2017-lea...series-tennis/

Leading the way in 2017 Leaf Signature Series Tennis among current players are Serena Williams and Roger Federer. Kim Clijsters, Caroline Wozniacki and Andy Murray are also on the checklist. And then there are the retired stars, headlined by Pete Sampras who has had only a handful of autograph cards in the past. Others include Martina Navratilova and Martina Hingis.