By Ian Westbrook
BBC Sport at Wimbledon
Serena Williams had few problems in despatching Magui Serna 6-4 6-0 to secure her fourth round place.
The defending champion's serve was the key as she raced through several service games with the Spaniard unable to do much to stop her.
Williams broke to lead 4-3 in the first set and although both players then held serve, Williams then reeled off seven consecutive games to win the match.
The match took under an hour and ended the day's Centre Court singles action.
"I'm getting better each round," said Williams.
"For years my Dad's been telling me to take the pace off my serve and for the first time in 10 years it finally clicked, I started placing them.
"But I didn't start that quickly and she hit some pretty good shots, she's got a wicked serve."
And after a severely disrupted week, the American takes comfort from the simple fact that she is still in the draw.
"I made it through with all the rain," she said.
"Last year I wasn't feeling that good about my play but this year I feel really good for the first time."