Serena Williams and Venus Williams survive at Wimbledon 2016
Defending champion Serena Williams and sister Venus both survived scares to progress at Wimbledon.
Serena beat the world number 65 Christina McHale, 6-7 (7) 6-2 6-4 on Centre Court while Venus won 7-5 4-6 10-8 against teenager Daria Kasatkina.
Serena trailed 2-0 at the start of the deciding set but won in two hours 29 minutes on Centre Court against her fellow American.
The top seed hit 40 unforced errors in the rain-affected match.
Shortly after an interruption while the Centre Court roof was closed because of rain, the world number one had a set point but failed to convert.
She thought she had won the opener but was denied by a narrow Hawk-Eye overrule before the impressive McHale went on to claim it on a tie-break.
Serena said: “It was a really good match. She played great and always does against me.
“I know that mentally no one can break me and I knew being a break down in third set I had to put my mind to it and that’s what I did.”