Former world number one Caroline Wozniacki is out of the Italian Open after withdrawing with a leg injury.
The Dane pulled out after losing the first set of her match with Danielle Collins on a tiebreak.
It’s the second straight tournament Wozniacki has withdrawn with injury after a back complaint forced her out of Madrid.
Collins, 25, will now play two-time Grand Slam winner Garbine Muguruza on Wednesday.
“Obviously, I feel for Caroline, what she’s going through with her injuries,” said Collins.
“It’s never fun to go out there and play against somebody that’s hurt, and dealing with that kind of pain.
“I was happy with the way I played, but it’s just not a fun situation.”
Aryna Sabalenka and Anastasia Pavlyuchenkova are also out after being eliminated by Alize Cornet and Maria Sakkari respectively.
Carla Suarez Navarro is going strongly though after a strong 6-4, 1-6, 6-3 win against Dayana Yastremska.
Julia Goerges also impressed in her 6-3, 6-4 success over Dayana Yastremska.
Do you think you can win a point against Serena Williams?
Mark Petchey says Andy Murray is gunning for another Grand Slam title.
Take a bow Yevgeny Kafelnikov, Li Na and Mary Pierce.
“Enjoy Roger Federer while he’s still playing”.
Shock, horror! Nick Kyrgios involved in social media spat.
Bernard Tomic’s appeal against Wimbledon fine rejected.
Alexander Zverev looks to focus on tennis.
A look at the prize money on offer at the Grand Slams.
Get your daily dose of tennis news and gossip.
Mats Wilander unimpressed by Roger Federer’s tactics.