Roger Federer remained the last person sitting in the Royal Box watching Wimbledon action on Center Court on Monday.The contest between Arthur Fery and Grigor Dimitrov, which ended with Fery’s victory, did not end until 8 pm, with Alexander Zverev not yet facing Jiri Lehecka under the roof afterwards. Instead of leaving in the middle, as most celebrities do, Federer stayed out of respect for Zverev and Lehecka.Known for his grace on and off the court, the fit tennis legend was seen enjoying every ball as Zverev led 6-4, 7-5, 3-3 when the match had to be called off after reaching the 11 pm curfew at Wimbledon.Also in the Royal Box on Tuesday were tennis legend Billie Jean King, Formula One driver Kimi Antonelli, and England women’s football star Alessia Russo.Apart from the sporting stars, Comic Relief co-founder Lenny Henry, actor Ncuti Gatwa, and BBC Sport director Alex Kay-Jelski were also there.See:As Zverev’s match continued, some spectators returned to the Royal Box.The eight-time Wimbledon champion was a home crowd favorite at SW19. After losing to Dimitrov, Fery expressed his surprise and said that he saw Federer sitting in the front row of the Royal Box while he was playing.“‘When I switched on the TV in the changing rooms for the first match (at Center Court), the women’s match, I saw Roger in the Royal Box, I didn’t know he was coming. I sent a message to my team saying, ‘Roger is in the box, I’m a bit tight,'” said Fery, as quoted by the Daily Mail.“It’s unbelievable to be in that position where one of the best of all time is watching you, especially watching me play a five-set match against Dimitrov on Center Court, Wimbledon,” he added.Fery’s impressive run at Wimbledon will take her to the top 100 rankings in the world.He will next face ninth seed and French Open finalist Flavio Cobolli in the quarter-finals.Zverev and Federer played each other seven times before Federer retired. The 29-year-old German holds a 4-3 advantage in their head-to-head record.