Make me an ER diagram

I need an ER diagram to satisfy the following: We need a system to provide information about sports tournaments, e.g., handball, soccer, baseball or the like (you are welcome to choose your favorite team sport). For participating sports teams, we know their name, year of establishment, players, captain, coach, etc. Players play in different positions and have a manager who negotiates the contract details with the team (salary, benefits, etc.). The contract between the player and the team can be valid for one or more seasons. If the player does not have a working contract, this means that at the moment he/she does not belong to any team. Each season starts and ends at particular date of the year. A set of games between two teams are held during the tournament on different dates. The season starts with the regular season games and ends with semifinal and final games. Not all players of the team can play in a particular game. Each game has its own statistics, e.g., how many minutes the player was on the field, how many points/goals has the player scored, etc. The ER diagram should follow the notation in the uploaded image Need this done ASAP - within the next 1-2 hours!