Darren Cahill on X: "Federer's frame set-up. 16 gauge gut is 130mm. 17 gauge Alu-Power Rough is 125mm. Pre-stretch on the gut is probably 10% (5% an option) https://t.co/NslwVHoWWd" / X
Pre Stretching Tennis Strings - Perfect Tennis
Test Tecnifibre strings | Tennispro
Pre-stretching Ashaway Monogot ZX - using a 2nd racket as a stretching rig | Talk Tennis
Stringing myths debunked – Part II: Pre-Stretch or no Pre-Stretch? – stringing.info
How to pre-stretch Ashaway Monogut ZX or ZX Pro | Talk Tennis
Should you Pre-stretch Natural Gut Tennis String? - YouTube