Tennis fans are being told their health is not at risk despite reports of a swine-flu outbreak among ball boys at the Wimbledon Championships.

Thousands planning on heading to the All England Club should do so as normal, according to a tournament spokesman.

But a number of ball boys were today told to stay at home after showing signs of the illness, although they have not been tested.

No other measures have been put in place to contain a potential outbreak among the 30,000 fans heading to SW19 every day.

The club spokesman said: “Everything is going ahead as normal. If anyone does display symptoms while they are here, we are advising them to see a St John’s Ambulance official.”

He added there was no concern over the safety of fans and the situation was being monitored on a regular basis.

But according to a memo sent to the tournament’s staff from Ian Ritchie, chief executive of the All England Club, the Health Protection Agency had been consulted over a potential outbreak.

It stated: “A small number of our Championships’ personnel have reported a flu-like illness and consequently have been asked to stay at home.

“Having consulted closely with the Health Protection Agency, we have been reassured that since the incidence is entirely in line with the wider London community, there is no particular extra risk to all those connected with the event, be they players, media, staff or spectators, and we are able to continue with the Championships as normal.”

At this year’s tournament there are 250 ball boys from 19 schools across south London including Wimbledon High, Raynes Park High, Rutlish School, Wimbledon College, Bishopsford Community School and the Harris Academy.