The Aussie endured a down after a big up in Acapulco, losing in the first round. (Getty)

INDIAN WELLS, Calif.—After the biggest week of his career in Acapulco, Nick Kyrgios tumbled out in his opener at the BNP Paribas Open. The Aussie lost to Philipp Kohlschreiber 6-4, 6-4 on Saturday. 

"I was feeling good. I had, like, five days to kind of find my feet in practice and stuff," Kyrgios said. "I just didn't play well today. Yeah, that's normal."

There's rarely a Kyrgios match without a viral moment, and he didn't disappoint. He smashed a racquet, lost the first set and swapped his shoes from black to white Nikes, throwing his first pair to the crowd. 

The switch didn't make much of a difference, as Kohlschreiber moved on to a possible third-round showdown with top seed Novak Djokovic.

It's a disappointing result for Kyrgios, but there's plenty more ups and downs to go in 2019. He's also still in the doubles draw after a win with Taylor Fritz on Friday.

"I mean, obviously I would have liked to have done well here, keep the momentum going from Acapulco," Kyrgios said. "I'm still in doubles here. Just going to have some fun with Fritzy. That's it."