Updates from Thursday, July 10
World No.1 Serena Williams has withdrawn from next week's Swedish Open as she has yet to make a full recovery from a virus.
Williams, who won the Swedish Open last year, said: 'I decided not to play in Bastad, because I am still not feeling 100 percent.
'I want to be in perfect condition to go back on court, but unfortunately it's not the case. I really hope to be able to get back to training from next week.
'I want to thank all my fans and the event organisers, for their support and comprehension.
'Bastad was my favourite tournament I played in last year, thus I am very disappointed not to come back there. But there is still next, year, so I can't wait to go back there.'
Updates from Friday, July 4
ESPN.com has the latest on Serena's condition after falling ill at Wimbledon:
Serena Williams is entered and plans to play in the Collector Swedish Open, a tournament official told ESPN on Friday.
The Swedish Open begins July 14 at Bastad, Sweden.
Serena Williams and sister Venus were forced to retire from their second-round doubles match at Wimbledon after the younger sibling dealt with a viral illness, according to the official Wimbledon Twitter account:
BBC Sport noted their withdrawal, which came after both Williams sisters had already been eliminated from the singles draw during the first week:
Following the match, both Serena and Venus issued statements (via ESPN.com):
"I am heartbroken I'm not able to continue in the tournament," Serena said in a statement. "I thought I could rally this morning, because I really wanted to compete, but this bug just got the best of me."
"Unfortunately Serena has been feeling unwell for the past few days and she just couldn't play to her potential today," Venus said in a statement. "I'm really proud of her for trying because we just love playing doubles together. We are looking forward to coming back to Wimbledon next year."
Ben Rothenberg of The New York Times noted that the 30-time major champion, including 13 women's doubles titles, said she felt ready to faint:
Wimbledon provided a look at some pretty bizarre movements and actions from Williams during the warm-up session:
Clearly something wasn't right health-wise.
The Williams sisters tried to play on, but they dropped the first three games and then decided to call it quits. The team of Kristina Barrois and Stefanie Voegele will advance to third round after meeting far less resistance than expected.
It's unclear exactly what was bothering Williams. She will probably go through a more detailed evaluation than the one she received on court to see what the problem is, but the hopes of adding another trophy to the case is over.
All told, the hope is that the issue will not have any type of long-term impact, barring an unexpected diagnosis. Some rest and hydration should get her back to 100 percent before the U.S. Open Series begins leading up to the season's final major.