Novak Djokovic secured a place in the Wimbledon quarterfinals on Monday with a round-of-16 victory at the All England Club. Details of the match score were not immediately available, but the win keeps the reigning champion’s title defense on track. With longtime rival Roger Federer watching from the Royal Box, Djokovic acknowledged the Swiss great in his on-court interview. “Sometimes I wish I had a serve and volley and nice touch from the gentleman that’s standing there,” he said, adding that it was “probably the first time he’s watched me and I won the match.” The exchange drew applause from the Centre Court crowd and underscored the mutual respect between the two multiple-time Wimbledon champions.