We found an elixir of youth," Djokovic and Cilic, present in the second week at Wimbledon, joke about their longevity

Novak Djokovic, 38, and Marin Cilic, 36, are both through to the round of 16 at Wimbledon.

The Serb will face Alex De Minaur tomorrow, while the Croat will take on Flavio Cobolli. During an interview given by Cilic to the media outlet Sportklub yesterday after his qualification, Djokovic showed up to congratulate his colleague.

"Aren’t we young men?" the two players quipped to the journalist. "It’s all about perspective, angle, and point of view, you know?" Djokovic continued.

The journalist then asked them the following question: "How do you hold up so well despite your age?"

Cilic then joked: "We have an elixir of youth," followed by Djokovic: "We won’t reveal our secret.