The Fact is that Professional Grade tennis racket stringing machines are responsible for the majority of racket stringing that happens at professional events around the globe! I have been to many tennis events and have seen the spectrum of machines being used. There are a few key machines that produce a consistent and professional product that are worth mentioning here. If you are possibly looking to upgrade your current equipment or just want to see what is being used than keep reading. Generally Babolat Sensors or Star 5 machines are used at tournaments, Yonex uses there top line for stringing Yonex players at events, Tecnifibre has a machine that is used around the globe at there sponsored events, Wilson Uses the Baiardo machine at the US OPEN, Australian Open, Miami and other events. Pacific has a machine that is also used at some global events. Some stringing teams use older Babolat star 4 machines at tournaments because they are more portable and very reliable. If it's good enough for Roger, its good enough for me!.