Serena appears uncomfortable in one-sided victory against sister

Serena Williams demolished her older sister Venus 6-1 6-2 in a one-sided semi-final at the Family Circle Cup in Charleston last night.

At times it was painful to watch, with Serena appearing uncomfortable with how she dismantled her sister - at one point not even challenging a ball that was called in when clearly wide - and the whole affair was over in 54 minutes.

Venus was constantly troubled by her serve, producing eight double faults, and it took until the third game of the second set for the former world number one to hold.

Serena led applause for Venus after the match and chose to speak of her sister's return after a back injury which forced her withdrawal from March's Sony Open.

She said: "It's really exciting...it's hard on our bodies.

"We're doing great and we were just excited that one of us was going to the final."

It was the first time the sisters had faced each other since 2009 and while Serena has been in the ascendancy for some years, the first game gave no hint of the steamrollering to come.

Instead, Serena seemed to be going through the motions and her serve was not its usual formidable weapon, although the world number one held.

A fierce cross-court shot gave Serena break point in the following game which had set the tone for the match with regards to Venus' serve, a double fault bringing up 2-0.

The younger sister was getting into her stride, a 110mph serve produced en route to 3-0 in contrast to Venus.

Serena was quicker to everything and she moved to a 4-0 lead by passing Venus as she came into the net with a looping shot.

Venus finally got on the scoreboard in the fifth game when a fearsome forehand down the line gave Serena no chance.

However, Serena immediately broke back when Venus produced two successive double faults and she went on to win the set to love.

The crowd were urging Venus on but initially it had little effect as Serena took a 2-0 lead in the second.

Venus held to the delight of the stands and she was certainly moving her sister around the court more, but the match was moving towards an inevitable conclusion.

The decisive break came in the seventh game as Venus netted with Serena going 5-2 up, and a long return saw her win to love.

Serena said: "I felt great. I am really looking forward not only to tomorrow but the rest of the clay court season."

Serena will meet Jelena Jankovic in the final after the Serbian beat unseeded Stefanie Voegele 6-4 6-7 (6/8) 6-2 in a match lasting two hours eight minutes.