The action continues at Roland Garros on the eighth day of the second Grand Slam of the year. Read our guide to the talking points, trending topics and what to watch on Sunday.

Learning

Defending champion Garbiñe Muguruza's fourth round against French No.1 Kristina Mladenovic is one of today's blockbuster matches. They have played just once before, in the second round of Rabat in 2015. Mladenovic won a nailbiter 7-6(4), 7-6(6).

Kristina Mladenovic is one of three Frenchwomen in the last 16, along with Alizé Cornet and Caroline Garcia. The last time this happened at Roland Garros was in 1994, when Mary Pierce reached the final, Julie Halard was a quarterfinalist and Alexia Dechaume-Balleret made the fourth round. Back then, all three lost to Spanish opponents: Arantxa Sánchez-Vicario beat Halard and Pierce en route to the title, while Dechaume-Balleret fell to Conchita Martínez.

Meanwhile, Svetlana Kuznetsova and Caroline Wozniacki will be renewing a 13-chapter rivalry that stretches back to Indian Wells 2008, and this will be the fifth time the pair have met in a Slam fourth round. Remarkably, though, this will be their first encounter on clay. Wozniacki has the slight edge in both the overall head-to-head (7-6) and in their Slam meetings (3-2); all of Wozniacki's Slam wins have come at the US Open (in 2009, 2011 and 2016), while Kuznetsova was victorious at the Australian Open in 2013 and Wimbledon last year.

This is just the second time in the French Open second week for Caroline Wozniacki - compared to five times each at the Australian Open and Wimbledon, and six times at the US Open. She has lost to an unseeded player in her last three outings here: Bojana Jovanovski in 2013, Yanina Wickmayer in 2014 and Julia Goerges in 2015 (the Dane missed last year's edition through injury).

Of Samantha Stosur's 13 losses at Roland Garros, six have come to sometime champions of the event. Since 2005, she has only lost once to a player who would not make a French Open semifinal: her third-round defeat by Gisela Dulko in 2011.

Of Svetlana Kuznetsova's 13 losses at Roland Garros, seven have come to sometime champions here; the Russian's only defeats by players without at least a semifinal to their name came on her debut in 2003 (to Meghann Shaughnessy) and 2010 (to Maria Kirilenko).

Svetlana Kuznetsova stretches for a backhand (Getty)
Svetlana Kuznetsova stretches for a backhand (Getty)

When Venus Williams takes on Timea Bacsinszky today, it will be a rematch of their encounter at the same stage of the tournament last year. Bacsinszky won that 6-2, 6-4 for her first win over the American. 

Venus Williams owns a 5-4 record in Roland Garros fourth rounds, and will be bidding to make her first quarterfinal here since 2006. Bacsinszky, meanwhile, has never been defeated in the three Slam fourth rounds that she has played.

Jelena Ostapenko is the first Latvian to make the second week of Roland Garros in the Open Era, and the first to make the second week of any Slam since Larisa Neiland's Wimbledon quarterfinal run in 1994. If Anastasija Sevastova wins her delayed third-round match against Petra Martic today, it would mark the first time ever that two Latvian women have made the fourth round of a Slam.

Samantha Stosur is currently riding the longest active WTA Tour winning streak at eight, following her ninth title in Strasbourg last week. Elina Svitolina - yet to play her third round match - is just behind her at seven following her title in Rome.

Kristina Mladenovic captured headlines in the first week with her two overtime comebacks against Jennifer Brady, 9-7 in the third set, and Shelby Rogers, 8-6 in the decider. But it's Svetlana Kuznetsova who has spent the most time on court of the top half's fourth round players, notching up seven hours and 41 minutes on the terre battue to Mladenovic's seven hours and three minutes. Timea Bacsinszky has spent the least time on court at just three hours and 33 minutes; her nine lost games are also the fewest conceded in the top half.

19-year-old Jelena Ostapenko is the youngest player left in the draw and the only player in the top half making her debut in the second week of a Slam. She's bidding to become the first teenager to make the Roland Garros quarterfinals since a 19-year-old Anastasia Pavlyuchenkova in 2011.

For the full Order of Play, vist RolandGarros.com

Trending

Reading

Saturday was a big day for France at Roland Garros and here's how Reuters, via Eurosport, recorded a historic feat for the host nation's women.

Venus Williams is the oldest player left in the draw. She's reached the final here just once, back in 2002 - and Simon Cambers at ESPN makes the case for Venus as this year's champion.

Watching

Kristina Mladenovic's epic comebacks have made for some of the first week's most compelling viewing. Find out her thoughts on them below.