The tournament said only that Mattek-Sands had "an acute knee injury".
Colourful US star Bethanie Mattek-Sands suffered an horrific knee injury at Wimbledon on Thursday which left her screaming in pain, pleading for help and officials accused of freezing in her desperate moment of need. "It was like something you see only in the movies", Cristea told BBC News.
Cirstea said she knew immediately it was a serious injury.
As medical personnel and Mattek-Sand's husband rushed to the field, Cirstea turned away aghast at the seeming extent of her opponent's injury, tennis match completely forgotten.
Despite the player being in excruciating pain, medical help arrived rather slowly as a stretcher only came an estimated 10 to 15 minutes after the incident.
The All England Club said that a "qualified ambulance technician" was on the scene within a minute, but that did not stop the drama.
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The officials said some senior officers criticised the location of the checkpoint, arguing that it provided no real cover. About 100 Copts have been killed in such attacks in mainland Egypt since December.
American Bethanie Mattek-Sands was taking on Romania's Sorana Cirstea in a second-round singles match when Mattek-Sands crumpled to the grass while trying to return a volley. On Friday, a WTA spokesman said Mattek-Sands was having more tests on her right knee.
Mattek-Sands and her doubles partner Lucie Safarova were attempting to complete the calendar Grand Slam at Wimbledon.
"We all know grass is a little bit more risky than hard court or clay", she added. "I felt useless. All she kept saying was, 'Sorana, help me, help me'".
"I think someone has to take the video and actually time and see how long it took for people to get there".
The fall happened at around 4.45pm, and Mattek-Sands was taken away on a stretcher 25 minutes later. I'm not sure how the other courts are, if they're damaged that much as Court 18.
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