But after Bob Bryan held serve for 3-4, things started to unravel for Daniell and Schwartzman. The Argentine was broken twice in the set as the Bryans displayed their class to take the first set 7-5.
Daniell dropped his serve for the first time in the second game of the second set and from there the Americans took control, breaking twice more to win it 6-1 and reach the semifinals in 65 minutes on court.
Daniell and Schwartzman will rue their failure to take break point chances, converting just 1 of 10 in the match while the Bryans won four of six break points.
Despite the loss Daniell's expected to improve a couple of places in the ATP rankings to match his career high ranking of 34 next week. Daniell will head to Miami for next week's Masters 1000 tournament there where he is hoping to team up with his regular partner Dominic Inglot. He was unable to get into the strong Indian Wells field with Inglot but expects to get direct acceptance into Miami at sign in this weekend.
Miami is where Daniell made his debut at Masters 1000 level last year. Daniell and Schwartzman will share $56,000 US dollars for their efforts in Indian Wells.