Andy Murray has announced he will miss next week's Masters 1000 event in Madrid due to a back injury.
The Scot won the tournament back in 2008, when it was a hard court event, but has struggled since it was converted to a clay court competition three years ago.
The world number four has looked to improve on clay and has shown some solid but unspectacular form in recent weeks, though he was knocked out by lower-ranked players in both Monte Carlo and Barcelona.
Murray is hoping to return to action at the Masters 1000 event in Rome on May 14 as part of his build-up to the second Grand Slam event of the season, the French Open, that begins on May 27th.
A statement from Murray said: "It is with regret that on doctor's advice I have to withdraw from the Mutua Madrid Open with injury.
"I always love coming to Madrid so it is a big disappointment. I look forward to returning next year and wish everyone a great week of tennis."
The top three in the world, Novak Djokovic, Rafael Nadal and Roger Federer, are all set to be in action in Madrid as they prepare for the upcoming French Open on the clay courts of Roland Garros.