He's got to match or surpass Fed's all time slams record, bottom line. Also, as Pat mentioned, holding all four at one time would set him apart, as would winning EACH slam more than once, which no one has done in the modern era. Fed and Agassi have only won once in Paris. Nadal already has multiple titles at Roland Garros and more than one at Wimbledon, so he needs one more in Australia and one more in NYC after today (assuming he wins)</p>