URacquet Shop owner Mark Kuczynski, a United States Racquet Stringing Association (USRSA) Master Racquet Technician, brings extensive experience in providing stringing services at the highest levels of tennis. As a multi-year member of the ATP 250 Winston-Salem Open stringing team, he coordinated racquet logistics and delivered precision stringing for the world's top-ranked professionals. His tournament experience also includes serving on the 2023 and 2024 stringing team for the Eddie Herr International Junior Championships at IMG Academy, where he strung for leading juniors competing at the highest levels of junior tennis, as well as multiple top-50 ranked professional players conducting training blocks at IMG. Based in Philadelphia, PA, Mark has been the dedicated full-time stringer for the University of Pennsylvania's varsity tennis programs since 2022, and has additionally worked for numerous prestigious NCAA and Ivy League programs, including Wake Forest, Ohio State, University of Georgia, Princeton, Harvard, and Columbia. He has also been the primary stringer and team leader for multiple ITA Northeast Regional Championship tournaments and the Eastern College Athletic Conference (ECAC) Championships for three consecutive years. Mark's commitment to unparalleled professional service is underscored by his training from multiple Master Racquet Technicians and Grand Slam-experienced stringers.  In March 2026, Mark opened URacquet Shop, located in West Philadelphia just blocks from University of Pennsylvania and Drexel University in order to give non-professional and high level NCAA players in Philadelphia the ability to utilize his Master Racquet services and pick his brain on the latest racquet and string technologies in tennis.  When not working in the shop or playing tennis, Mark can be found at home relaxing with his fiance and their three cats.