Field hockey is one of India's national sports. It has a long history in India and Asia dating back over 1,000 years. The game is played between two teams of 11 players on a large grass field with goals at either end. Key rules include no physical contact with the ball and restrictions on the goalkeeper. Matches are officiated by umpires and consist of two 35-minute halves. India has had great success in field hockey internationally, especially in the early Olympic Games, and is governed domestically by Hockey India.