Denmark's Crown Prince Frederik (R) and Princess Mary (L) sit in the Royal Box on Centre Court before the start of the men's singles second round match between Spain's Rafael Nadal and Czech Republic's Lukas Rosol on day four of the 2014 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on June 26, 2014. AFP PHOTO / GLYN KIRK  - RESTRICTED TO EDITORIAL USE        (Photo credit should read GLYN KIRK/AFP/Getty Images)