Defending champion Andre Agassi has crashed out of the Nasdaq-100 Open at the hands of Agustin Calleri. The American, going for his fourth successive Miami title was never in command as he slumped to a 6-2 7-6 defeat after a hard-fought tie-break.
Argentine Calleri, who ended the 33-year-old American's 19-match winning streak, will face Romania's Andrei Pavel in the quarter-finals.
Agassi, the fourth seed, was seeking his seventh Nasdaq title in total.
"I wish somebody would tell me how he hit so well," Agassi said.
"I raised my standard to stay in there. I was lucky to win two games in the first set.
"The guy was just making me play great tennis and I wasn't coming up with it."
Agassi hit nine aces to Calleri's five but was simply unable to respond to his opponent's precision.
"You try to tough it out. But I couldn't. He was just too good out there," he said.