Dominic Thiem ended Roger Federer's bid for a record sixth Indian Wells title with a battling three-set victory.
The Austrian seventh seed fought back to beat Federer 3-6 6-3 7-5.
Swiss Federer, a 24-time Grand Slam champion, converted just two of 11 break points and made 32 unforced errors to Thiem's 25.
Thiem collapsed onto his back in delight as he secured his first title since September 2018 and his first at a Masters 1000 event.
Thiem will rise to fourth in the world rankings on Monday.
Federer, who lost last year's final in California to Juan Martin del Potro, made a confident start.