One major theft has been reported in the men's locker room while players and coaches are concerned it is the latest incident in a mini-crime wave which has plagued the tour all year.

Former French Open champion Albert Costa, who coaches Spanish compatriot Feliciano Lopez, had a bag stolen containing 1,700 euros and 1,000 dollars in cash at the All England Club, the Daily Mail claimed.

French player Michael Llodra has also had his wallet taken even though he was only away from his locker for 30 seconds.

The problem has infuriated players and coaches some of whom feel one of their own must be responsible.

"We are aware of the incident and we have told our staff in the locker room to be extra vigilant, but it is difficult with so many people in the area. It is up to the player concerned to inform the police," said a Wimbledon spokesman.

There have been a number of thefts from the changing rooms at events around the world this year.

Sweden's Jonas Bjorkman reported personal effects stolen at both the Australian and French Opens while the Daily Mail claimed that at last week's Wimbledon qualifying event at Roehampton, Dane Kenneth Carlsen had his watch stolen and Frenchman Nicolas Mahut his iPod.

The biggest single theft is believed to be the loss of 5,000 euros suffered by Czech player Radek Stepanek, the fiance of Martina Hingis, at the Monte Carlo Open in April.