At the moment, Murray is not believed to be suffering any unpleasant symptoms from the disease.
While no-one can ever say for sure how they contracted the virus, there must be a strong chance that Murray was infected at the National Tennis Centre in south-west London. A number of British players have been training there – after all, it is the only available place to play – and the Telegraph understands that Paul Jubb, the British No 14, tested positive at the end of last week
