Novak Djokovic (AP Photo)Novak Djokovic’s incredible Wimbledon 2026 quarter-final victory earned praise from millions of tennis fans around the world. Among those celebrating the Serbian’s remarkable effort was Olympic sprint legend Usain Bolt, who was left amazed after watching the five-hour match unfold on television.Bolt, an eight-time Olympic gold medallist, took to Instagram shortly after Djokovic’s record-breaking win over Felix Auger-Aliassime. The Jamaican icon jokingly referred to the 39-year-old as an “old man” while applauding his incredible endurance and determination. Djokovic later noticed the message and responded with a warm reply of his own.Usain Bolt jokes about Novak Djokovic’s age after five-hour Wimbledon battleNovak Djokovic produced one of the greatest performances of his career on July 8, battling past Felix Auger-Aliassime in the longest Wimbledon quarter-final ever played. The Serbian took five hours and 15 minutes to secure a dramatic five-set victory and book his place in the semi-finals, where he will face world No. 1 Jannik Sinner.The match tested Djokovic physically and mentally. He even required treatment on his calf during the contest but refused to give up. His determination impressed fans across the sporting world, including Usain Bolt, who had also attended Wimbledon earlier in the tournament as a guest in the Royal Box during Djokovic’s third-round match.This time, Bolt followed the action from home and shared his reaction on Instagram soon after the match ended. The former sprint superstar praised Djokovic’s incredible effort in a light-hearted way. He joked about the Serbian’s age while making it clear that he was full of admiration for his performance after spending more than five hours on court.In his Instagram Story, Bolt congratulated Djokovic on an outstanding contest and playfully called him an “old man,” adding several laughing emojis to show the comment was made in good humour. His message highlighted how remarkable it was to produce such a physically demanding performance at 39 years of age.Djokovic appreciated the support from one of the greatest athletes in Olympic history. The 24-time Grand Slam champion shared Bolt’s Story and replied with a short but warm message. He thanked the Jamaican star for his encouragement and said he was ready to keep pushing forward in the tournament.Bolt has remained a regular visitor to Wimbledon even after retiring from athletics. Earlier in the championships, he watched Djokovic’s third-round victory over Arthur Rinderknech from the Royal Box on Centre Court. He was seated alongside several high-profile guests, including former UK Prime Minister Rishi Sunak and British actor Joseph Fiennes.Now Djokovic’s focus shifts to another huge challenge. The Serbian will face defending champion Jannik Sinner in the Wimbledon semi-finals on Friday, July 10. Sinner enters the match in excellent form, but Djokovic’s stunning comeback against Auger-Aliassime proved once again that he remains one of the toughest competitors in tennis.Bolt’s playful message summed up what many sports fans were thinking after the marathon contest. Even at 39, Djokovic continues to produce extraordinary performances on the biggest stage.