Marin Cilic has broken a Croatian semi-final drought at the US Tennis Open in New York.

He's advanced to the final four with a straight sets win over Czech Tomas Berdych, becoming the first Croat to reach the semis in 18 years.

The last man to make it was his coach Goran Ivanisevic.

Cilic's delighted to reach his first Grand Slam semi-final since 2010.

He says he's had a tough couple of years, but everything is paying off now.

Meanwhile, Roger Federer and Gael Monfils are underway in their quarter final.