Hockey Olympic Hockey Centre Aug 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Stick: Traditionally made of wood, now more frequently from fibreglass, kevlar and carbon fibre composites London Olympics men’s hockey gold medallist Benjamin Wess (GER) Ball: Hard plastic over cork core. Diameter: 73mm 80-95cm Team: 11 players (with up to five substitutes) Penalty corner: Mark from which attacking team can take penalty. Ball must leave and re-enter scoring circle Goalkeeper Fullbacks Midfielders Forwards 55m 23m line 91.4m Scoring circle: Goals must be scored within it Goal Penalty spot: Free shot on goal for fouls inside scoring circle Free hit: Must be taken from this line if awarded within 5m of scoring circle Goalkeeper Hand protectors Helmet (full face mask) Chest pads Leg guards and padded shorts Foot guards (kickers) Playing time Four 15-minute quarters, followed by sudden death overtime in event of draw Sources: Rio 2016, Olympic.org, FIH Pictures: Associated Press