Roger Federer and Andy Murray reach Wimbledon quarterfinals

Spain’s Rafael Nadal holds his ankle as he plays Luxembourg’s Gilles Muller during their match on day seven at the Wimbledon Tennis Championships in London Monday, July 10, 2017. (AP Photo/Tim Ireland)Luxembourg’s Gilles Muller celebrates as he wins a point against Spain’s Rafael Nadal during their match on day seven at the Wimbledon Tennis Championships in London Monday, July 10, 2017. (AP Photo/Tim Ireland)Spain’s Rafael Nadal looks up as he plays Luxembourg&rsquo