DOUBLES specialist Jamie Murray will return to the site of his greatest tennis achievement this week, determined to rediscover his form.

Murray beat younger brother Andy to a Grand Slam title when he partnered Jelena Jankovic to the Wimbledon mixed doubles crown in 2007, while he reached the semi-finals last year with Liezel Huber.

However, he has seen his men’s doubles ranking plummet following his split from Eric Butorac, with whom he won three ATP Tour titles in San Jose, Memphis and Nottingham two years ago.

Last year he worked with experienced doubles campaigner Max Mirnyi, but despite high hopes the partnership failed to gel and they mustered just one minor title for their efforts.

This year Murray – who has lost his British No 1 doubles rankings to Ross Hutchins – has worked with Simon Aspeln, Jamie Delgado, Paul Hanley, Pavel Vizner, Gilles Muller and Jonathan Erlich as he seeks to find the magic formula.

The 23-year-old was knocked out of the second round of the AEGON Championships along with Erlich in the duo’s first outing together this month, but Murray insists the form book will go straight out of the window on the SW19 grass.

“It’s not been great recently,”

admitted Murray, who will team up with Erlich to face eight seeds Lukasz Kubot and Oliver Marach in the first round at Wimbledon.

“I’ve not been playing well, but I’ve started to feel better in the last couple of weeks.

“Obviously getting the wins on the board is the most important thing, and that’s not happening.

“I’m looking forward to Wimbledon.

Wimbledon is Wimbledon, it’s our biggest tournament of the year and it’s a place where I’ve got great memories.”

Murray is not the only one in desperate need of a parachute to slow a nosedive in form since the dizzy heights of 2007 as then partner Jelena Jankovic is also currently languishing in the tennis doldrums.

The Serbian ace crashed out of the first round of the AEGON International in Eastbourne to world No 32 Anna Chakvetadze of Georgia this week.

Jankovic’s form is in near-terminal decline and she is a world away from her 2008 exploits, which saw her end the year top of the world rankings.

Having reached the semi-finals of three of the four Grand Slams last year, the world number six has failed to repeat the trick this year, and has bowed out of both the Australian Open and the French Open in the fourth round.

As she heads to Wimbledon shorn of all confidence, Jankovic revealed she is considering hanging up her racquet for good.

“I don’t seem to have the motivation that I had before to make the sacrifices you have to as a professional athlete,” said Jankovic, who begins her Wimbledon campaign against Germany’s Julia Goerges.

“You are in a constant battle with yourself – if you want chocolate you have to tell yourself ‘no’ and it can be very hard.

“Every athlete has their ups and downs and they know how hard it is to keep motivated.

You have to train for four of five hours and that is the life of a professional athlete.

“At the moment I don’t have the desire that I did have to work hard and train hard.

“I don’t know why that is. I really wish I could have a break now for a little bit and start to want to play tennis again.”

Jankovic, who has progressed to the fourth round in 2006, 2007 and 2008 at SW19, also admitted of all the Grand Slams Wimbledon was her least favourite competition.

“I have no idea about Wimbledon,”

she added. “I really don’t know how far I will go – I’m just going to take each match as it comes and try my best.

“Of all the Grand Slams Wimbledon is the one I’ve performed worst at.

“I’ve got a few days to prepare but you can’t get better in a few days – it takes a lot of practice, a lot of repetition and a lot of hard work to improve.”