Sisters are knocked out of Olympics singles, Blake advances.

Not only won’t Venus and Serena Williams have a one-on-one title rematch in the Olympics, neither will compete for a medal. After saying earlier this week that a tennis singles showdown to follow their Wimbledon face-off would be “fantastic,” Venus and her sister both lost quarter-finals match-ups Thursday in Beijing. Venus, who won Wimbledon, fell to China’s Li Na, while Serena lost to Russia’s Elena Dementieva. The sisters can still capture a gold in doubles competition as they did at the 2000 Games in Sydney. While the siblings were upset, James Blake did some upsetting when he beat Roger Federer in straight sets. Blake moves on, leaving Federer two titles shy of Pete Sampras’ record of 12.