- at what number of matches in a single tournament does the medical withdrawal rate substantially increase?
- does different ages of competition result in different injury rates?
- do males have more medical withdrawals in junior events than female players?
- at what number of hours of practice/competition per week does injury risk rise for the junior tennis player ?
- does some data exist that links the total number of matches per year with medical withdrawal rates?
- how many 10 year old players report specializing in only tennis compared to older players (i.e. 16 and 18 year olds)