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.