Top seed Simona Halep extracted brutal revenge on American teenager Amanda Anisimova with a 6-0 6-1 victory to move ominously into the fourth round of the French Open.

Anisimova caused a huge upset last year when she comfortably beat Romanian Halep, then the defending champion, in the quarter-finals, but could not reproduce that form.

Halep was in typically miserly mood on Court Philippe Chatrier, giving precious little away and waiting for the 19-year-old Anisimova to make mistakes.

She pocketed the opening set in 23 minutes and although 25th seed Anisimova, who had dropped only four games in her first two matches, briefly threatened a revival at the start of the second set Halep raced away to victory.

Halep will face another rising star in the next round when she plays Poland's Iga Swiatek in a repeat of their fourth-round clash last year in which Halep dropped only one game. 

Elina Svitolina advanced into the fourth round with a solid 6-4 7-5 victory over Russian Ekaterina Alexandrova, staying focused throughout - a tough ask in the near total absence of fans, she said.

The Ukrainian third seed, who reached the last eight twice at Roland Garros, benefited from the 27th seed's early string of unforced errors to take the better start as she set up a meeting with France's Caroline Garcia.

She battled back to beat 16th seed Elise Mertens 1-6 6-4 7-5 in a thriller.

Garcia, who has never quite delivered on her early career promise, was roared on by several hundred fans as she finally claimed victory on her sixth match point.

Argentine qualifier Nadia Podoroska continued her dream run with a 6-3 6-2 defeat of Anna Karolina Schmiedlova to reach the fourth round.

The 23-year-old from Rosario, ranked 131st in the world, was in total command against Slovakia's Schmiedlova who had taken out former world number ones Venus Williams and Victoria Azarenka.

Podoroska, whose great grand parents hailed from Ukraine, is the first woman from Argentina to reach the last 16 in Paris since Gisela Dulko in 2011.

With either 114th-ranked Czech Barbora Krejcikova or Bulgarian Tsvetana Pironkova, ranked 157th, up next she now has a golden opportunity to reach the quarter-finals.