Table 4. Median (IQR) of shot and movement characteristics of junior and professional tennis players at the 2012-2017 Australian Opens. |
| Activity |
Junior Boys |
Professional Men |
Junior Girls |
Professional Women |
| Sample Size (matches) |
12 |
21* |
6 |
21* |
| Sample Size (shots) |
8,282 |
25,906 |
3,361 |
13,281 |
| Rally Length |
4.8 (1-13) |
5.0 (1-14) |
4.4 (1-10) |
4.6 (1-12) |
| Shot Productiona,b |
| Serve |
72 (49-103) |
134 (91-168) |
64 (48-81) |
75 (51-114) |
| Forehand |
140 (84-227) |
237 (138-367) |
118 (84-147) |
120 (74-173) |
| Backhand |
119 (61-185) |
219 (122-344) |
89 (57-112) |
110 (56-206) |
| Shot Speeda,b (kph) |
| Serve |
158 (119-193) |
179 (140-213) |
146 (116-176) |
153 (122-186) |
| Forehand |
113 (75-142) |
119 (77-148) |
110 (75-134) |
111 (76-135) |
| Backhand |
105 (68-131) |
108 (70-137) |
103 (69-128) |
106 (68-129) |
| Speed at Baselinea,b (kph) |
| Forehand |
56 (47-65) |
60 (54-67) |
48 (41-56) |
54 (47-61) |
| Backhand |
40 (29-47) |
45 (40-49) |
34 (26-40) |
34 (28-41) |
| Net Clearancea,b (m) |
| Serve |
129 (106-150) |
142 (126-160) |
109 (91-126) |
123 (107-140) |
| Forehand |
90 (65-108) |
104 (91-117) |
76 (59-90) |
78 (65-93) |
| Backhand |
68 (45-85) |
72 (59-84) |
59 (41-72) |
46 (36-57) |
| First Serve Patternsa,b (%) |
| Wide |
37.8 |
45.7 |
36.2 |
36.3 |
| T |
43.2 |
46.9 |
35.9 |
47.7 |
| Body |
19.0 |
7.4 |
27.9 |
16.0 |
| Second Serve Patternsa,b (%) |
| Wide |
21.9 |
32.0 |
21.0 |
23.8 |
| T |
30.7 |
36.7 |
21.7 |
41.0 |
| Body |
47.5 |
31.3 |
57.3 |
35.1 |
| First Serve Patternsa,b (%) |
| Wide |
37.8 |
45.7 |
36.2 |
36.3 |
| T |
43.2 |
46.9 |
35.9 |
47.7 |
| Body |
19.0 |
7.4 |
27.9 |
16.0 |
| Serve Return Timeb (s) |
0.54 (0.38-0.80) |
0.55 (0.37-0.81) |
0.52 (0.38-0.76) |
0.48 (0.35-0.75) |
| Serve Return Reaction Timea,b (s) |
0.73 (0.56-0.95) |
0.66 (0.52-0.87) |
0.78 (0.63-0.97) |
0.73 (0.58-0.92) |
| Serve + 1 Stretchb (m) |
4.99 (1.46-8.77) |
5.10 (1.65-8.77) |
4.92 (1.42-8.67) |
5.25 (1.68-9.25) |
| Sideline Distancea,b (m) |
| Forehand |
1.94 (0.35-3.68) |
1.77 (0.38-3.56) |
1.93 (0.32-3.67) |
1.89 (0.37-3.66) |
| Backhand |
2.27 (0.53-3.81) |
2.09 (0.47-3.71) |
2.30 (0.48-3.84) |
2.14 (0.45-3.78) |
| Distance from Baselinea (m) |
| Forehand |
3.05 (0.54-5.19) |
3.11 (0.59-5.17) |
2.98 (0.55-5.15) |
3.03 (0.57-5.18) |
| Backhand |
3.11 (0.58-5.17) |
3.00 (0.59-5.17) |
3.06 (0.46-5.19) |
3.04 (0.57-5.30) |
| Inside Out Forehanda (%) |
9 |
10 |
8 |
8 |
| Down the line Backhanda,b (%) |
9 |
11 |
9 |
11 |
| Distance travelled per pointa,b (m) |
6.9 (0.3-19.9) |
7.4 (0.3-24.2) |
6.3 (0.2-18.4) |
5.9 (0.2-19.6) |
| Distance travelled per matcha,b (m) |
993 (562-1,610) |
1,990 (1,243-2,916) |
798 (549-1,012) |
881 (556-1,504) |
| Peak foot speeda,b (kph) |
12.0 (5.1-21.6) |
10.5 (4.7-18.2) |
11.9 (4.9-21.1) |
9.1 (3.7-16.3) |
| Changes of direction per pointa,b |
6.0 (0-18) |
5.0 (0-22) |
6.0 (0-18) |
4.5 (0-18) |
| Work per pointa,b |
2,236 (36-7,335) |
1,761 (27-6,257) |
1,690 (30-5,462) |
917 (17-3,342) |
| Work per matcha,b (per 1000 units) |
320 (168-641) |
475 (290-695) |
216 (166-278) |
138 (85-248) |
|
a Indicates a difference between junior boys and professional men at the 5% level or less |
* Professional matches were matched on the round of junior matches |
b Indicates a difference between junior girls and professional women at the 5% level or less |
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