The crowd sang “Happy Birthday” to Djokovic as a cake with candles was brought out onto the court GENEVA: Novak Djokovic celebrated his 37th birthday on Wednesday with a much-needed win as he gears up for his French Open title defense, progressing to the Geneva quarter-finals. The world number one downed Germany’s Yannick Hanfmann 6-3, 6-3 in the second round at the Parc des Eaux-Vives grounds. Djokovic took a wild card to play in Geneva in a bid to rescue an alarming dip in form ahead of next week’s French Open, the second Grand Slam of the year. The crowd sang “Happy Birthday” to Djokovic as a cake with candles was brought out onto the court following his win. He lifted the cake and showed it off to the crowd, having a nibble before offering some to the ball boys and girls.