ISTANBUL (Reuters) - Bulgarian Grigor Dimitrov smashed three rackets on his way to losing the Istanbul Open final to Argentine Diego Schwartzman on Sunday.

Second seed Dimitrov was one set ahead and 5-2 up in the second before Schwartzman, the world No. 87, fought back to win the his first ATP title 6-7(5), 7-6(4), 6-0.

"I let myself down, I let my team down, I let my family down with that behaviour," Dimitrov told reporters. "I started cramping at 5-2 in the second set. It was very unfortunate that I couldn't close out the match. I have to give credit to Diego."

Dimitrov, the world No. 29, lost 11 of the last 12 games of the clay-court match, smashing up two rackets along the way. Trailing 5-0 in the third set, he then broke up another racket when level at 40-40 in the sixth game of the set, resulting in a match-ending penalty.