Crossword clues for Tennis number:LOVETennis numberCHANGEENDSDirective in tennis after odd-numbered gamesCHANGEENDSTennis umpire's order after odd-numbered games ... and a hint to the two sets of circled letters in each of eight answersSAFINRussian-born ex-tennis star who, with his sister, were the only brother/sister pair to both reach world number one