Nadal and Del Potro to resume rivalry in semis

Mal Taam/MALTphoto
Rafa has lost three straight to DelPo.
FROM THE BNP PARIBAS OPEN AT INDIAN WELLS, THURSDAY, MARCH 17- The Juan Martin del Potro that battered Rafael Nadal in the semifinals of the 2009 US Open and then pounded his way past Roger Federer in the final isn