French Open champion Garbine Muguruza has withdrawn from the Italian Open semi-finals with a neck injury, just eight days before she is due to start the defence of her title at Roland Garros.

The retirement ensured Ukraine’s Elina Svitolina will play in Sunday’s final against sixth-seeded Romania Simona Halep.

Muguruza called her trainer and had medical attention 22 minutes into the match, with Svitolina leading 4-1.

It was her fourth retirement of the season after Miami, Brisbane and Dubai.

“I want to say a fast recovery to Garbine, she has such a big tournament ahead in Roland Garros,” Svitolina told the crowd.

“It’s going to be very tough for her and hopefully she will recover very quickly. I am still a little bit shocked.”

The WTA said the injury happened as the Spaniard was returning serves while practising before the match, she made a movement and her neck froze.

The French Open in Paris starts on May 28.

Halep had earlier made light of heavy conditions to cruise into the final with a 7-5 6-1 victory over Kiki Bertens.

The Romanian, a winner in Madrid last weekend, made sure of her first Rome final in an hour and 17 minutes, with the start delayed by half an hour due to overnight rain.

After a hard-fought first set, with Bertens having her chances and saving five set points to hold serve and take it to 4-5 before then breaking Halep, the Romanian broke back and served out cleanly.

She then romped to a 4-0 lead in the second set before Bertens held serve. But there was no holding off Halep, who made only one unforced error in the set and wrapped up the victory as the skies opened again.

“I feel happy we could finish actually,” said Halep.

“It’s really tough to stop because of the rain but here we are, I’m in the final and it’s really nice.”