Marin Cilic won the Zagreb Indoors for the fourth time in his career, beating Tommy Haas in straight sets.
Daniel Munoz/AP

ZAGREB, Croatia -- Marin Cilic from Croatia overcame problems with his serve to win the Zagreb Indoors tournament on Sunday, defeating top-seeded Tommy Haas from Germany 6-3, 6-4.

Cilic gained his fourth title in Zagreb and became the third Croat overall to win at least 10 career titles.

Cilic - champion here in 2009, '10 and last year - struggled with his first serve in the opening set but played some great returns with a solid baseline performance.

The 35-year-old Haas broke in the first game but then lost five out of the next six.

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