1 Neutrophils: are the most abundant type of white blood cells and are an important part of the innate immune system. 2  Neutrophils are a type of phagocyte (cells which engulf and then digest, cellular debris and pathogens).
BBC Sport tennis. The rules of scoring. The maximum number of sets in a match is five for men and three for women. Usually the first player to win six games wins a set but if the score becomes five-games-all, one player must be two games ahead to win the set. So a player must win the set 7-5 or 8-6 or 9-7 and so on.
Tennis is played on a rectangular court, usually with a grass, clay, or hard court surface. The court is 78 feet (23.77 m) long and 27 feet (8.23 m) wide for singles matches and 36 feet (10.97 m) wide for doubles matches. The net is 3 feet 6 inches (1.07 m) high at the outer posts and 3 feet (.914 m) high in the middle.