Juan Martin del Potro survives scare to advance at Indian Wells.

The 29-year-old Argentine tennis player has earned a spot in the semifinals at the BNP Paribas Open in Indian Wells.

del Potro defeated Germany’s Philipp Kohlschreiber 3-6, 6-3, 6-4 to reach the semis.

For a second-straight match, the world No. 9 found himself needing to win two straight sets after a sluggish first.

del Potro was out of sorts when this match started, having trouble with the way Kohlschreiber was mixing things up. The German was moving del Potro around as much as he could, and he was also making excellent use of the drop shot.

del Potro would not stay down for long. The new set invigorated del Potro, who took out some frustration on his racquets. Settled in, he took care of business in the second set to force a decider.

The third set was even more straightforward, as del Potro began to play his best tennis right when Kohlschreiber started to play his worst. del Potro’s forehand was at its fearsome best late in the match, and Kohlschreiber was unable to handle it.

The icing on the cake for the world No. 9 came when he gave Kohlschreiber a taste of his own medicine, utilizing a drop shot of his own to help hold serve and go up 4-2 in the third.

del Potro will face 32nd-seeded Milos Raonic on Saturday.