The VCORE Si 100 updates the VCORE Xi 100. As with the previous version, this racquet is a great option for intermediate and advanced players in search of a modern player\'s racquet with a very accurate and spin-friendly response. With its Black Micro Core Technology, Yonex brings more stability to upper hoop, the place where advanced ball strikers make contact. There\'s also some serious spin to be had thanks to the Bt Hybrid Grommet System. This technology uses differently shaped grommets to enable the strings to move and snap back with greater force. From the baseline our TW playtesters appreciated the controllable power and firm response. On big swings this racquet delivers a very precise and spin-friendly response. At net the fast feel and stable response make for easy volleying. Finally, aggressive servers will find everything they need to hit powerful bombs or skidding slices. All in all Yonex has delivered a fine update that should satisfy aggressive ball strikers in need of speed, spin and precision.