Who is better all-time, Roger Federer or Pete Sampras?

• It's Federer, his 15 Grand Slams (and counting) will be very tough to catch and pass. (Loyal Homer)

• It's Sampras, he played - and defeated - legends during the peak of men's tennis, and still holds many records. (Sports Geek)

• Why no Johnny Mac in this poll? We're afraid he'll yell at us.