Feliciano Lopez has doubts whether Spain's golden generation led by Rafael Nadal and Carlos Alcaraz will ever be replicated.

With Nadal's glittering career nearing its end, the torch for Spanish tennis has been passed on to Alcaraz, who at just 20 has already won Wimbledon and the US Open.

The pair have now combined for over half of Spain's grand slam titles, and while Lopez feels his nation will have more success in the future, the former world number 12 has concerns whether it will match the levels that Nadal produced. 

"I believe that we are not going to experience the generation of Spanish tennis players that we lived through again," Lopez told Stats Perform. "People have to be clear about that.

"But that does not mean that there will not be other great tennis players that will represent the country very well in the coming years.

"I don't know Spanish tennis in the minor categories, beyond some names that have been told to me, but I know that there are kids of 16 or 17 who play well.

"In the end, I think Spanish tennis has been in a place that is very difficult to get back to, but I'm sure that apart from Carlitos, there will be other young players who will bring us joy during the next four, five or six years."

Alcaraz has reached at least the semi-finals in the last four grand slam tournaments he has played, winning two of them, and Lopez has faith that he can carry the torch for Spanish tennis once Nadal calls it a day.

"Spanish tennis is in the hands of Carlitos and when Rafa announces his retirement, the entire country will want him to win," Lopez added. 

"He has already won two grand slams and has been number one. It is a blessing to have a player like Carlos at a time when Rafa has a year left to retire."

Nadal's decorated career has coincided with a great era of Spanish sport, with the nation's male and female football teams both winning World Cup titles while they have also enjoyed success in the likes of basketball and motorsport.

Lopez takes pride in his country's sporting achievements, explaining: "A country like Spain that is not a world power, and sport does not have the aid that neighbouring countries invest, in the last 20 years, has not stopped winning titles in all disciplines: Tennis, football, and basketball."