With more space between strings, an open pattern allows the racquet to bite the ball better. This helps players accentuate their spin. According to stringer Roman Prokes of RPNY Tennis and ...

head stringer and coach at the Family Circle Tennis Center. Here’s his assessment: Head ASP technology lets you swap out the grommet set and choose between a 16x19 and 16x16 string pattern.

Big racquets have bigger 'sweet spots' but are harder to control. A 'sweet spot' is the area in the middle of the strings which gives the cleanest hit. A mid-size racquet has a hitting area of about ...