Here we go then, Sonay Kartal serving for a bagel.

Briton Kartal wins the first point, again after an Andreeva error.

Kartal has been great so far, but Andreeva hasn't helped herself. Fifteen unforced errors.

A straight-set win in one hour and 12 minutes for Jessica Pegula, who is safely through to round two of the women's draw.

The third seed joins fellow American Coco Gauff, who won earlier today, in the next round.

Next up on Court Suzanne Lenglen is Great Britain's Jack Draper in first-round action against Italy's Mattia Bellucci.

Another Andreeva error helps Kartal break to love.

Three breaks of serve, no games conceded. Kartal has been completely dominant.

Kartal continues to dictate points, Erika Andreeva looks lost on court as she nets again to slip to 0-40.

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Well that moment of opportunity for Mackenzie McDonald didn't last long at all.

As soon as the threat appeared, Novak Djokovic just reset himself slightly and played out five points on the bounce to ensure a hold of serve.

McDonald will be kicking himself for not capitalising on those break points though.

Kartal is steaming towards the first set, she holds to 15 as Andreeva struggles to keep her returns in play.

She's got it. Briton Sonay Kartal is on a roll, benefitting from another error to grab an insurance break.

Novak Djokovic is attempting to work Mackenzie McDonald around the court this service game, but his opponent is pulling some lovely shots out of the bag.

So much so, the American now has three break points to get a break back in this second set. Let's see what he can do...

Erika Andreeva saves the first break point, but Sonay Kartal sets up another.

Novak Djokovic gives his opponent a brief clap after Mackenzie McDonald lifts a lovely little drop shot over the net.

And there's the hold for the American.

It might be, you know. Erika Andreeva hits a weak forehand into the net. Advantage Kartal.

Kartal isn't giving away any freebies. She's so good at staying in rallies and forcing mistakes as she goes from 40-15 down to bring up deuce.

Is a double break on the cards?

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It's looking all too easy for Novak Djokovic at the moment. Mackenzie McDonald has really struggled to put a dent in the Serb's serve.

Another routine hold for Djokovic.

Erika Andreeva sets up another break point but once again Briton Sonay Kartal relies on a pacey serve to survive.

Kartal then adjusts her cap before rattling off two more strong serves to sneak to a hold.

Top start from the Brit.

Strong first serve from Kartal and Andreeva can't return it. Break point saved.

Oh no, this isn't looking good. Up go one or two umbrellas as the rain starts to spit down. We play on for now.

Better from Andreeva who forces an error with a deep forehand that clips the baseline.

30-30, a big point coming up - and Kartal concedes the momentum, spinning a backhand long.

Novak Djokovic races to a 0-30 lead on Mackenzie McDonald's serve, but he can't make enough of the half-chance and the American recovers well to get the hold.

Djokovic is gesturing angrily to his team.

She gets it. Sonay Kartal breaks right at the start of the match as Erika Andreeva hammers a backhand into the net.

Briton Kartal is looking really confident for somebody making their French Open debut. She stays in a rally and waits for an Andreeva error to bring up break point. 30-40.

Novak Djokovic hasn't lost a first-round match at a Grand Slam since 2006.

Mackenzie McDonald's task was already a tough one today, but it's just got even harder. He's just lost 10 points in a row and he's down a set and a break.