Serena and Venus Williams had to withdraw from the women's doubles at Wimbledon today after some bizarreness occurred with Serena. The tennis star looked visibly oriented and not right at all.
The announcers were also worried and say that she should not be playing:
https://www.youtube.com/watch?v=joiYG8ykKtg&w=620
Another look:
It was definitely weird, but it turns out she was in fact suffering from an illness.
https://twitter.com/Wimbledon/statuses/484011372439961600
(H/T
The Big Lead)