he has 6 grand slams, will have 7 by the end of this year when he wins another french, and possibly 8 but ill only give him a 50 percent chance to win wimbledon again. then i think his chances are the us open are not significant enough to factor in. he's 22 right now and he likely has 4 years left before his type of physical game burns him out. so lets do the math. also he has a .5 chance to win the AO again since he has not made it to finals any previous year. plus as the years go by it will be harder for him to do well at AO and Wimbledon. this is all arguable give and take but roughly my measurement units. 2009 - 1 AO, 1 FO, .5 Wimbledon, 0 USO = 7.5 grand slams 2010 - .5 AO, 1 FO, .5 Wimbledon, 0 USO = 9.5 slams 2011 - .5 AO, 1 FO, .5 Wimbledon, 0 USO = 11.5 slams 2012 - .5 AO, 1 FO, .5 Wimbledon, 0 USO = 13.5 slams so if nadal's career is done in four years and he keeps up even half the pace of this year, he should end up with 13.5 slams.