SHENZHEN, China (AP) Austin Krajicek of the United States rallied to beat James Duckworth of Australia in the first round at the Shenzhen Open on Monday.

Krajicek lost the opening set but fought back to take the second on a tie break and level the match before seeing out a 5-7, 7-6 (6), 6-1 victory.

John Millman of Australia is also through to the second round after Ernests Gulbis retired with injury when the Latvian was losing 7-6 (7), 2-0.