Table 2.

Player and team demographics

Team	Players	Age, y	Years pro	Training surface	Competition surface	% of career on FT	% of career on NT
1	21	24.4 ± 4.2	4.7 ± 3.7	FT	NG	38	62
2	17	23.1 ± 2.2	3.2 ± 2.7	NG	NG	34	66
3	10	26.5 ± 2.9	6.5 ± 2.4	NG	NG	26	74
4	15	23.6 ± 3.3	3.8 ± 3.2	NG	NG	23	77
5	18	24.0 ± 5.4	4.4 ± 4.6	NG	NG	29	71
6	18	25.9 ± 5.6	5.2 ± 4.7	NG	NG	33	67
Total	99	24.5 ± 4.2	4.5 ± 3.8			35	65

FT, Football Turf. NG, Natural Grass.