By Shrivathsa Sridhar PARIS, May 31 (Reuters) - Iga Swiatek said tension got the better of her as her French Open campaign unravelled in a fourth-round defeat by Ukraine's Marta Kostyuk on Sunday, a rare loss of control for the four-time champion who has come to define dominance on clay.

Iga Swiatek is the four time French Open champion. She is the third seed in this year’s tournament. Swiatek is looking to regain the form that gave her the informal nickname “Queen of the Clay” a few years ago.

A day after Coco Gauff’s defeat, Roland-Garros lost another of its favorites with Iga Swiatek, outplayed by Marta Kostyuk. The Pole, a multi-time champion in Paris, was undermined by pressure.

After an early exit at Roland Garros, Iga Swiatek admitted tension overwhelmed her. The four-time champion, stopped by Marta Kostyuk, reflects on the setback and vows to improve. Eliminated in the fourth round of Roland Garros by Marta Kostyuk,