July 10 (Reuters) - Order of play on the main showcourt on the 13th day of the Wimbledon championships on Sunday (play starts at 1300 GMT, prefix number denotes seeding): CENTRE COURT MEN"S SINGLES FINAL 1-Novak Djokovic (Serbia) v 7-Matteo Berrettini (Italy) MIXED DOUBLES FINAL 7-Neal Skupski (Britain)/Desirae Krawczyk (U.S.) v Joe Salisbury (Britain)/Harriet Dart (Britain)