Quentin Grimes has a simple goal for his stay in Las Vegas. “Really come out here and dominate,” he said after the Knicks summer league team went through its first practice at Cox Pavilion. “I feel like I played well last year. Just coming in this year being a second-year guy, I know what to expect, I know how the games are. Just go out there and try to dominate every time offensively and defensively.”