Spain's Carlos Alcaraz reacts after winning the point against Canada's Felix Auger-Aliassime during the group stage men's singles match between Spain and Canada of the Davis Cup tennis tournament at the Fuente San Luis Sports Hall in Valencia, on Sept 16, 2022. (PHOTO / AFP)

A near four-month stint on the sidelines saw Carlos Alcaraz lose the world number one ranking to Novak Djokovic and as the Spaniard prepares for his return to the court at the Argentina Open later on Wednesday he says he is determined to get it back.

Alcaraz climbed to the top of the ATP rankings in September after winning his first Grand Slam title at the US Open but a torn abdominal muscle during the Paris Masters in November put the 19-year-old out of action.

Carlos Alcaraz, of Spain, returns a shot to Frances Tiafoe, of the United States, during the semifinals of the US Open tennis championships, Sept 9, 2022, in New York. (JOHN MINCHILLO / AP)

It's tough to play my first tournament after a long time for me, after four months ... So it's going to be really, really tough to win the tournament (in Buenos Aires) or be close to winning. My hope is to feel that I am okay with the injury, with my body and try to play well.

Carlos Alcaraz, Spanish professional tennis player

After 20 weeks at the top, Alcaraz slipped to number two in January when Djokovic won the Australian Open, an event the Spaniard had to skip due to injury.

"It has been a long time (I spent) at number one," said Alcaraz, who begins his season in Buenos Aires against Serbian Laslo Djere in the second round.

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"Now it's a goal for me to recover number one and try to do my best in these tournaments to be back on that number. I'm looking for that."

Alcaraz did not want to put too much expectation on himself in his first tournament since November.

"I'm feeling great. I'm getting used to these conditions, to play with the best players, so at the moment I'm feeling well," he said.

"It's tough to play my first tournament after a long time for me, after four months.

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"So it's going to be really, really tough to win the tournament or be close to winning. My hope is to feel that I am okay with the injury, with my body and try to play well."