Top-ranked Iga Swiatek ran into a spot of bother as she beat Danka Kovinic of Montenegro 6-3, 7-5 to reach the fourth round of the French Open and extend her winning streak to 31 matches on Saturday.

The Polish player, who is unbeaten since last February, has also won 46 of her last 47 sets after claiming titles on clay court in Stuttgart and Rome.

The 2020 champion is bidding to become the fourth player since 2000 to lift the Suzanne Lenglen Cup multiple times after Justine Henin, Serena Williams, Maria Sharapova.

The 20-year-old is on the longest unbeaten run in the women’s tour since Serena Williams bagged 34 victories in succession in 2013.

“I wanted to play aggressively but maybe putting too much power and her shots were so powerful so it was tough to handle at full speed. I had to take fewer risks but she did a great job defending,” said Swiatek.

Swiatek broke for 2-0 on her sixth opportunity but appeared to be struggling to handle her opponent’s heavy forehand.

Kovinic, the world No. 95, even managed to break back in the seventh game but immediately dropped serve again with four unforced errors in a row. Swiatek followed up on serve to bag the opening set.

Kovinic’s efforts took their toll as she had less stamina and she made more and more unforced errors, losing four consecutive games to allow the world No. 1 to move 4-1 up. But she found some unsuspected resources to break back twice and even go 5-4 up after winning 11 points in a row.

Facing the prospect of dropping her first set in the tournament, Swiatek found better angles to level for 5-5 and break decisively when Kovinic completely misfired a forehand.

Whipping the ball with poise, Swiatek wrapped it up on her second match point with an unreturnable serve.

In the men’s singles, Italian 11th seed Jannik Sinner saved 11 set points in the second set before beating wasteful American Mackenzie McDonald 6-3, 7-6, 6-3 to reach the fourth round.

Sinner had his back to the wall at 5-2 down in the second set but kept his composure as the world No. 60 squandered chance after chance to clinch it.

Second seed Daniil Medvedev cruised past Miomir Kecmanovic of Serbia with a comfortable 6-2, 6-4, 6-2 victory in less than two hours to advance to the fourth round.

Greek fourth seed Stefanos Tsitsipas also made it to the fourth round. He thrashed Sweden’s Mikael Ymer 6-2, 6-2, 6-1.