that means an outside chance of 3 slams if he is fit?
I think if top form he might be more of a threat then Murray and he gave Nadal a tough time at wimbledon last year and he can beat Nole. . I don't see really anyone outside the top 4 that poses the type of threat Del Potro does if hes healthy and in top form really.
Of course.. he probably won't be in top form. And Nadal will have to be below top form as well.. I think Nadal will be fine by next year though.
Potentially.. Del Potro could be a big threat next year at 3 of the 4 anyways.. Of course at the end of the day.... he probably wont be