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Marin Cilic, the US Open tennis champion, has good manners.

Two weeks before the start of the tournament in Flushing Meadows, the Croatian had dinner with his managers at Primola on Second Avenue and then went across the street to get a visa photo taken at the CVS.

The female clerk who helped the pro recognized him, so she wished Cilic luck and told him that she knew he would win the tournament.

When Cilic returned to Primola last week to celebrate his victory, he wrote the woman a thank-you note on a menu and had a waiter deliver it to her with a bouquet of flowers. His mama raised him right.