Fair play

1. Nouns

1.1. a competition

1.2. a competitor

1.3. a spectator

1.4. (an) injury

1.5. an amateur

1.6. a spectator sport

2. Idioms

2.1. a whole new ball game

2.2. move the goalposts

2.3. a level playing field

2.4. score an own goal

2.5. fair play

2.6. be on the ball

2.7. start the ball rolling

2.8. take your eye off the ball

2.9. keep your eye on the ball

3. Phrases with to

3.1. to injure sb / yourself

3.2. to get injured

3.3. to compete against sb

3.4. to take sth up

3.5. to score (a goal)

3.6. to follow (the) rules

3.7. to be keen on sth (football, sports)