Andy Murray says it took an enormous physical and mental effort to reach world number one. Photo: AP Photo/Mark J. Terrill
LONDON - World number one Andy Murray returns to the Barcelona clay courts that launched his career this week, as he puts in some overtime ahead of the French Open.

Murray, who played and lost his first professional match as a 17-year-old at the tournament in 2005, against Jan Hernych, took a late entry into the Barcelona Open after an early defeat to Spain’s Albert Ramos-Vinolas in Monte Carlo last week.

While giving him some crucial match time on a surface he has grown to love, it also offers the 29-year-old the chance to consolidate his position at the top of the ATP rankings.

Murray accumulated a barrel-load of ranking points during last season’s clay-court swing, winning the Rome Masters and reaching the French Open final, where he lost to Novak Djokovic.

With those points to defend and the effects of an elbow injury still lingering, Murray knows the pressure is on to keep the number one ranking he secured in November.

“I hope to stay there for a long time, but it’s hard,” Murray, who spent two years at the Sanchez-Casal Academy in Barcelona as a junior, told the ATP’s website.

“It took me 12 years to get there, and the physical and mental effort it took to do it last year was enormous. It’s not easy to stay there, but I hope I can.

“It’s always hard to maintain your ranking at the top of the game. A lot of the young ones are starting to play better and better, so it’s going to be tough.”

Surprisingly, Murray’s first ATP title on clay did not arrive until 2015 in Munich. He quickly followed that by beating "The King of Clay" Rafael Nadal in the Madrid final.

Last year was even better, and he won 18 of his 21 matches during the European clay-court season. The transition from the hardcourts to the clay can still be tricky though, even for a player now so at home on the surface.

“The best way to adapt to new surfaces (is) playing naturally against the best players in the world,” he said.

Stepping back out on the Barcelona clay for the first time since 2012 is also something of a trip down memory lane for Murray.

“I have great memories, not only from training and living here, but also because I played my first professional match on one of these courts and I remember it well,” he said.

“The last time I came here I hadn’t won a clay-court tournament, nor been in big finals, nor beaten some of the best players on this surface. But in the past few years I’ve had great wins against Rafa and Novak.”

The top seed faces Bernard Tomic on Wednesday.