Petra Kvitova

Outside of the Williams sisters, Petra Kvitova has been the most successful woman at Wimbledon in recent times.

She won the title in 2011 and 2014 but has failed to make it further than the third round since then.

The Czech has already won five titles this year and her win/loss record for 2018 sits at 37/7 despite not performing at the Grand Slams.

Kvitova won the premier Wimbledon warm-up tournament in Birmingham but had to withdraw from Eastbourne with a hamstring injury as a precaution to not cause further damage a week out from the major event.

She has been one of the form players of the year so far and is one of the major contenders for the 2018 Wimbledon title.

Garbine Muguruza

The Spaniard's best surface is without doubt clay but Garbine Muguruza is the defending champion of Wimbledon and was a finalist in 2015.

She hasn't had a great season so far with a 21/11 win-loss record but as the defending champion, she can't be ruled out as a contender.

Serena Williams

She is the best female tennis player we have ever seen and probably the best we will ever see but Serena Williams has only played three tournaments in 18 months, none of which were on grass.

Her ranking dropped while she was out after having a baby but in controversial circumstances, Wimbledon have opted to seed her at 25 despite her ranking being at 183.

Williams had to pull out of Roland Garros in the fourth round due to a right pectoral injury that was preventing her from serving.

She has won the title seven times which is the equal second most alongside Steffi Graff and behind Martin Navratilova, who won it nine times.

Despite not featuring in any warm-up tournaments, it is believed she will be at Wimbledon and even if she is only at 80% fitness, she can still beat anybody.

Venus Williams

If it weren't for her little sister, Venus Williams would probably have been the best player this century.

As a five-time champion, her most successful tournament has been Wimbledon and she was the runner-up last year and a semi-finalist the year before.

Like her sister, Venus hasn't played since Roland Garros but you know they will both have prepared impeccably for the event.

A champion like Williams is always a contender at any tournament she plays but even more so on the grass.

Maria Sharapova

Maria Sharapova won Wimbledon 14 years ago in 2004 when she was just 17 years old.

She hasn't played at the All England Club since 2015 due to a drug suspension and injury but she has climbed her way back up the rankings and has been playing well.

The Russian has been in the shadows of the Williams' sisters for most of her career but as a five-time Grand Slam winner, she is a champion in her own right and can never be ruled out in major tournaments.

Sharapova made it all the way to the quarter-finals at Roland Garros and while she hasn't played any warm-up tournaments, she is still in the mix.

Simona Halep

As the current world number one, you have to include Simona Halep as a contender.

Fresh off her maiden Grand Slam victory at the French Open, she has had a terrific year so far with a 35/6 win-loss record.

Halep has made it to the quarter-finals at Wimbledon in the last two years and was a semi-finalist in 2014.

With the form she is in, the Romanian must be in the running as a possible 2018 champion.

Ash Barty

In terms of Aussie contenders, Ash Barty is top of the list.

She won the Nottingham event and only dropped one set along the way, beating former Wimbledon finalist Johanna Konta.

In the two years that she has featured in the main draw at Wimbledon, Barty has drawn a seed in the first round and lost, but this year she is seeded at 17 so that won't be a problem.

The Aussie is having a career-best season with a 25/11 win-loss record and is our best chance at Wimbledon success on the Ladies side this year.