I am having a hard time getting photos zoomed well enough to determine if Kerber used "BT Hybrid" grommets. Here's a video that explains this type of grommet system:
Would some of you racquet geeks be able to see whether or not Kerber is actually using a true Si 100 with these elongated grommets?
Would some of you racquet geeks be able to see whether or not Kerber is actually using a true Si 100 with these elongated grommets?