WATCH: Carlos Alcaraz tries in vain to guess superstar with $266,000+ worth most expensive tennis card ft. Serena Williams, Federer, Nadal, Djokovic

Carlos Alcaraz hilariously struggled to understand a huge hint while trying to guess the tennis player - from Roger Federer, Serena Williams, and other legendary players - with the most expensive card of all time. The Spaniard's reaction to finding out the cost of the card was also hilarious.

During his recent interaction with Topps - one of the most popular makers of trading cards - Alcaraz was asked to guess which player had the most expensive tennis card, to which his mind immediately went towards the Big 3.

"All of the top tennis players, I guess. What? Federer?"

"Djokovic? Rafa?"

However, when he received a negative response to all of his answers, the Spaniard asked if it was a retired player. The questioner said that 'she' was a retired player and stressed on the she. Despite the hint, the 21-year-old initially struggled to think of a player, but once he cracked the code, he immediately got the correct answer.

"Ah, she... (smiles) Aha alright, Serena Williams."

When he realized that the card cost $266,000+, Carlos Alcaraz had a hilarious one-word response

"F**k."

The Spaniard later came to know that the buyer of the card was none other than Williams' husband Alexis Ohanian and called the expensive card a 'good buy'.

"Ah right, So I understand now. It was a good buy then."

The card in question is the Serena Williams 2003 NetPro International Series Authentic Apparel Patch Autograph PSA 8/ AUTO 10 which costs $266,400. Federer is second on the list with a $181,200 card. Interestingly, Carlos Alcaraz is already eighth on the list with a $32,400 card.

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"I don't want our grandkids to ever have to go to museums to see someone else's possession" - Alexis Ohanian on having the largest Serena Williams card collection

Serena Williams and Alexis Ohanian - Source: Getty

During a recent collaboration with a trading card marketplace, Serena Williams' husband Alexis Ohanian showed off his card collection featuring over 4500 cards valued at about $2.5 million. The Reddit co-founder said his reason for creating this collection was to allow his family's future generations to have direct access to the 23-time Grand Slam champion's legacy.

"The whole plan for this is that like grandkids, great grandkids, they'll have this collection and probably hundred years from now, museums will want to put pieces of this up for the public display. But I don't want our grandkids to ever have to go to museums to see someone else's possession. They should be the ones renting it out. So that's why we got the greatest collection of all time for you [Williams]," Ohanian said. (at 1:47)

Ohanian had recently bagged a rare Andy Roddick NetPro card while looking for a Williams card.