Carlos Alcaraz returns to action in Buenos Aires after four months on the sidelines admitting “it won’t be easy” playing catch-up with rivals who already have six weeks under their belts in 2023.

The 19-year-old Spanish sensation captured a first Grand Slam title at the US Open last year before going onto become the youngest ever men’s world No 1.

However, a leg muscle tear at the Paris Masters in November meant he missed the start of this season, including the Australian Open, won by Novak Djokovic.

Alcaraz also lost his top ranking to the 22-time major winner from Serbia.

“This will be my first tournament since I picked up the injury in Paris,” Alcaraz told a news conference on Saturday at the Buenos Aires clay court event.

“It’s been four months since then. But I always arrive thinking about winning and wanting to win, even though it won’t be easy after such a long time without competing.”

Alcaraz will get his season underway in the Argentine capital with a second round clash against either Fabio Fognini or Laslo Djere after receiving a first round bye.

“I’ve come a few days early, to train with really good players, gradually improve and to be able to start the tournament as well as possible,” added the top seed.

Alcaraz had a breakout 2022. As well as becoming the youngest US Open champion since Pete Sampras in 1990, he also defeated Djokovic and compatriot Rafael Nadal on back-to-back days on his way to the Madrid Masters crown.

He also claimed the Miami Masters and ATP 500-level trophies in Rio de Janeiro and Barcelona.

“It was a very good year. I achieved my dream, my goal, very quickly. I dealt with it as naturally as possible,” said Alcaraz.

“After becoming No 1, I had to set new goals, new things for the long term, to continue to enjoy myself, continue to improve, because I’m very young and I have a lot of things to improve.

“Despite being the No 1, you have to keep training and looking forward.”

He has few doubts over who he needs to keep emulating – Nadal, Djokovic and the now-retired Roger Federer.

“When they were young, they were so good, but as time has gone by, they’ve improved.”