According to him, yes:Did he really?
Well that's stupid. But thank you for the source!According to him, yes:
And from an interview he did after becoming Roddick's coach:
Tennis Week: What advice have you given him this week about playing on grass?Brad Gilbert: Concentration. Don’t give your serve up. Play every point with a sense of urgency. Don’t celebrate. You celebrate when it’s over. Don’t wear a visor. I’m not a visor fan. The visor — Gone! That’s my one coaching change, No Visor!