Rafael Nadal's retirement announcement on Thursday left Novak Djokovic as the last man standing from tennis's golden era but with major question marks over the Serb star's own long-term future in the sport. Djokovic remains marooned on 24 Grand Slam titles, a record for a man but still level with Margaret Court in the all-time total. For the first time since 2017, he will finish a season without a Grand Slam trophy. Djokovic, who will be 38 next May, salvaged his season by winning Olympic gold in Paris, a victory he described as his "greatest achievement".