Wilson K Factor Six One Tour 90 - L3 (4 3/8") - Asian Version This iconic "K90" racquet was endorsed by Roger Federer from 2007 through 2009, which included some of his most memorable and significant wins on tour. It comes brand new with a factory sealed grip and cardstock in the head! Please see photos for details of the racquet as evidence of its condition before bidding.  A signature may be required upon delivery.