MADRID, Spain (AFP) — World No. 1 Jannik Sinner said Tuesday his principal aim as he prepares for the Madrid Open is to be in the “best possible shape” for Roland Garros next month as he seeks to complete a career Grand Slam.

The 24-year-old won his first major title on clay earlier this month as he downed rival Carlos Alcaraz in straight sets in the Monte Carlo Masters final.

Next he turns his attentions to the 1000-level event in Madrid as the clay-court season ramps up towards the only Grand Slam tournament Sinner has not yet won — Roland Garros, which will run from 24 May to 7 June.

“I never played very well here, so let’s see how it goes this year,” Sinner, who has never got past the quarterfinal stage in the Spanish capital, told reporters the day before the Madrid Open begins.

“I’m trying to improve as a player and here might be one of the most challenging ones because of certain things (altitude and wind).”

Despite being heavily favoured to pick up a fifth consecutive Masters title, Sinner revealed that for him “the most important is Roland Garros.”

“We try to maximise to be in the best possible shape there, but I’m here trying to do my best and then we’ll see how it goes,” he added.

Sinner lost an all-time classic Roland Garros final last year to Alcaraz, despite holding three championship points.

But the Italian said he regretted the upcoming absences of the world number two, due to Alcaraz suffering a wrist injury, and 24-time Grand Slam champion Novak Djokovic in Madrid.

“It’s a very big pity to not have (Alcaraz) here and also Novak, the two biggest stars in tennis,” Sinner said.

“We have shared since last year a lot of tournaments, but again, in my mind I also know if I want to play against Carlos it’s in the final and the way to the final is very long.”

Top seed Sinner will start his Madrid Open campaign in the second round against a yet to be determined opponent.