Reigning Madrid Open champion Iga Swiatek suffered a crushing semi-final defeat by Coco Gauff on Thursday, with the American triumphing 6-1, 6-1.

The Polish world number two and five-time Grand Slam winner could not force a single break point and dropped serve five times as she fell in 64 minutes.

Swiatek, usually excellent on clay, has struggled during her Madrid title defence.

She dropped sets against Alexandra Eala and Diana Shnaider, and then was dealt a bagel by Madison Keys in just 24 minutes on Wednesday.