Andy Murray of Britain attends a promotional event for the upcoming French Open tennis tournament at the financial and business district of La Defense, west of Paris, France, REUTERS/Benoit Tessier

Andy Murray is confident he will recover in time for the start of the French Open after the Briton was laid low by illness this week.

The world number one was also diagnosed with shingles in February before sustaining an elbow injury in March that ruled him out of the Miami Open and Britain’s Davis Cup quarter-final loss to France.

Murray, who opens his Roland Garros campaign against Russian Andrey Kuznetsov and faces a potential third-round clash with either claycourt specialist Nicolas Almagro or Argentine Juan Martin Del Potro, has struggled this year.

The 30-year-old’s win percentage of 70.8 percent represents the worst start to a year by a world number one since Pete Sampras in 1999.