Serena Williams was forced to pull out ahead of her second-round match against Tsvetana Pironkova.
The 23-time grand slam champion came into the tournament nursing an Achilles injury she picked up during her semi-final defeat at the US Open earlier this month.
Meanwhile, 12-time champion Rafael Nadal laid down a marker with a thumping 6-1 6-0 6-3 win over Mackenzie McDonald.
Here, the PA news agency looks back at day four at the French Open.
Picture of the day
Stat(s) of the day
95th RG victory44-0 as No. 2 seed25th consecutive win in Paris
That's @RafaelNadal 👏#RolandGarros pic.twitter.com/ZUwm9MdAy5
— Roland-Garros (@rolandgarros) September 30, 2020
Smash of the day
That poor racket 💥😳@PutintsevaYulia certainly wasn't happy here... 😡
🇫🇷 #RG20 LIVE📺 Eurosport 1&2📱💻 Uninterrupted coverage: https://t.co/7Sr1bWyVse pic.twitter.com/g0QVZBjK4H
— Eurosport UK (@Eurosport_UK) September 30, 2020
Yulia Putintseva's win over Nadia Podoroska wasn't all plain sailing.
Quote of the day
Match of the day
Sixth seed Alexander Zverev is no stranger to a five-set marathon and he came through another to squeeze past Frenchman Pierre-Hugues Herbert.
The German, runner up to Dominic Thiem at the US Open earlier this month, won 2-6 6-4 7-6 (5) 4-6 6-4.
Fallen seeds
Women: Serena Williams (6)
Men: John Isner (21), Benoit Paire (23)
Up next
Day 5️⃣ order of play is here! 👇#RolandGarros pic.twitter.com/WUEwd51XBN
— Roland-Garros (@rolandgarros) September 30, 2020
Novak Djokovic and Stephanos Tsitsipas headline on Chatrier while former champion Garbine Muguruza faces Kristyna Pliskova on Suzanne Lenglen.
