Serena Williams has a subtle message for her fans regarding her Wimbledon expectations as the world No 1 launches her bid for a sixth crown at the Championships.

Williams returns to the All England Club next week for the first time since her distressing meltdown midway through a doubles match last year in which she was so badly affected by an apparent virus that she could barely hit the ball over the net. Her deplorable health conditions ensured that her Wimbledon campaign was halted midway.

“I haven’t done great at Wimbledon the past two years, so I’m going to take it a day at a time there,” Williams said.

“My goal is just to do better than the last couple of years, do one more and one more and one more.” said the World number 1.

The American secured her first Wimbledon triumph way back in 2000 and also claimed the title in 2002, 2008 and 2009 as well as three years ago.

She suffered fourth and third-round losses on her last two outings in south-west London but, having won both the Australian and French Opens this year, is a red-hot favourite to make it three Grand Slams in a row in 2015.

“Obviously I would love to win a Grand Slam. I think it would be awesome,” said Serena, who defeated Lucie Safarova to clinch her third Roland Garros title earlier this month.

According to Gilbert, who has worked with the likes of Andy Roddick, Andy Murray and Kei Nishikori in his time, the rest of the field have no chance if Williams is on song.

“One thing I’ve learned over the years is never underestimate a Williams, ever. Serena won the French without being at the level she is capable of.”

“If she is on, the others have no chance, zero. They do have a chance if she’s a bit off her game and they are on theirs but if Serena is playing well they are playing for second place, plain and simple.”

With 20 grand slam titles to her name, Williams sits third on the all-time list and is closing fast on Margaret Court’s record of 24, with the possibility of equalling second placed Graf’s tally of 22 by the end of the year.