frames with fresh strings. Tennis commentators, including former pro Wojciech Fibak, have compared her playing style to that of Martina Hingis, with Fibak describing her as "a natural mover who understands the geometry of the court". Radwańska cited Hingis as an inspiration. She and Hingis had their lone tour meeting in 2007, with Radwańska winning in three sets. Radwańska played with the Babolat Pure Drive Lite racquets until the end of the 2016 season. At the start of the 2017 season, beginning with the Shenzhen Open tournament, Radwańska started playing with a new tennis racket, made by the Japanese manufacturer, Srixon. Other tennis players who also use Srixon rackets include Kevin Anderson, Misaki Doi, Kurumi Nara, Zarina Diyas and Magda Linette. For her on court tennis apparel, Radwańska is currently sponsored by Lotto Sport Italia. Coaches Radwańska began her tennis career with her father, Robert Radwański, as her coach. She stated: "My dad was traveling with me all my life and we practiced together for 17 years, almost actually 18. So it's pretty long time." In 2011, Radwańska began working with Fed Cup coach Tomasz Wiktorowski, who replaced her father. Borna Bikić, a veteran coach on the WTA Tour, briefly joined them in 2012. Radwańska hired Martina Navratilova as part of her team at the conclusion of the 2014 season. In April 2015 they parted ways after Navratilova stated that she was too busy to continue in her part-time role as Radwańska's consulting coach. Charitable work Since 2009, Radwańska and her sister Urszula have devoted time during the off-season to Szlachetna Paczka ("Noble Box"). The charity has its volunteers go door-to-door throughout the year compiling a database of families in need, asking them what would help ease the pressures of the holidays. Then, for a three-week period from mid-November to early December, donors are given a list to take with them to the supermarket, where they fill a shopping cart with the food, clothing and more to donate to them. Additionally, she and Urszula offer their support to Habitat for Humanity and its project in Warsaw. As Habitat for Humanity ambassador Radwańska stated, "It's an honor to be a part of such a fantastic cause and be involved with Habitat for Humanity, helping underprivileged families across the world. I have great respect for all the volunteers and those working hard everyday against poverty housing." On 23 July 2022 Radwańska participated