## 3 Results
### Descriptive Analysis
\begin{tabular}{l l l l l l l l} \hline \hline  & & \multicolumn{3}{c}{**Second Serve (Deuce)**} & \multicolumn{3}{c}{**Second Serve (Advantage)**} & \multicolumn{2}{c}{**DE-AD Comparison**} \\ \hline
**Criteria** & **Code** & **N** & **\%** & \(\chi^{2}\) Goodness-of-Fit** & **N** & **\%** & \(\chi^{2}\) Goodness-of-Fit** & \(\chi^{2}\) of Independence** \\ \hline TARGET & CN & 66 & 36.7 & \(\chi^{2}=15.600\) & 70 & 47.3 & \(\chi^{2}=44.770\) & \(\chi^{2}=57.309\) \\ SERVICE & T & 78 & 43.3 & \(p<0.000\) & 11 & 7.4 & \(p<0.000\) & \(p<0.000\) \\ BOX & W & 36 & 20.0 & \(p<0.000\) & 67 & 45.3 & \(p<0.418\) \\ \hline \multirow{3}{*}{RALLY LENGHT} & LN & 49 & 27.2 & \(\chi^{2}=8.233\) & 23 & 15.5 & \(\chi^{2}=22.797\) & \(\chi^{2}=6.967\) \\  & MD & 53 & 29.4 & \(p<0.016\) & 56 & 37.8 & \(p<0.000\) & \(p<0.031\) \\  & SH & 78 & 43.3 & \(p<0.016\) & 69 & 46.6 & \(p<0.000\) & \(p<0.146\) \\ \hline \multirow{3}{*}{HITTING} & ZG1 & 23 & 12.8 & & 15 & 10.1 & & \\  & ZG2 & 11 & 6.1 & \(\chi^{2}=144.167\) & 13 & 8.8 & \(\chi^{2}=145.108\) & \(\chi^{2}=3.357\) \\ ZONE & ZG3 & 54 & 10.0 & \(p<0.000\) & 35 & 23.6 & \(p<0.000\) & \(p<0.500\) \\  & ZG4 & 90 & 50.0 & \(p<0.000\) & 84 & 56.8 & \(p<0.000\) & \(p<0.500\) \\  & ZGS & 2 & 1.1 & & 1 & 0.7 & & \\ \hline \multirow{3}{*}{FINAL STROKE} & ACE & 2 & 1.1 & & 1 & 0.7 & & \\  & BH & 75 & 41.7 & \(\chi^{2}=79.867\) & 71 & 48.0 & \(\chi^{2}=83.838\) & \(\chi^{2}=1.880\) \\  & FH & 71 & 39.4 & \(p<0.000\) & 56 & 37.8 & \(p<0.000\) & \(p<0.598\) \\  & OTH & 32 & 17.8 & & 20 & 13.5 & & \\ \hline \multirow{3}{*}{FINISH ZONE} & BSO & 35 & 19.4 & & 39 & 26.4 & & \\  & LTO & 23 & 12.8 & & 29 & 19.6 & & \\  & NET & 40 & 22.2 & & 25 & 16.9 & & \\  & Z1 & 26 & 14.4 & \(\chi^{2}=43.111\) & 19 & 12.8 & \(\chi^{2}=59.676\) & \(\chi^{2}=15.914\) \\  & Z2 & 10 & 5.6 & \(p<0.000\) & 3 & 2.0 & \(p<0.000\) & \(p<0.026\) \\  & Z3 & 5 & 2.8 & & 6 & 4.1 & & \\  & Z4 & 24 & 13.3 & & 7 & 4.7 & & \\  & Z5 & 17 & 9.4 & & 20 & 13.5 & & \\ \hline \multirow{3}{*}{WINNER} & RW & 82 & 45.6 & \(\chi^{2}=1.422\) & 66 & 44.6 & \(\chi^{2}=1.730\) & \(\chi^{2}=0.030\) \\  & SW & 98 & 54.4 & \(p=0.223\) & 82 & 55.4 & \(p=0.188\) & \(p<0.862\) \\ \hline \multirow{3}{*}{POINT} & RWFE & 14 & 7.8 & & 8 & 5.4 & & \\  & RWUE & 43 & 23.9 & & 44 & 29.7 & & \\ \cline{1-1}  & RWW & 25 & 13.9 & \(\chi^{2}=54.200\) & 14 & 9.5 & \(\chi^{2}=63.865\) & \(\chi^{2}=7.475\) \\ \cline{1-1}  & SWFE & 8 & 4.4 & \(p<0.000\) & 13 & 8.8 & \(p<0.000\) & \(p<0.188\) \\ \cline{1-1}  & SWUE & 56 & 31.1 & & 50 & 33.8 & & \\ \cline{1-1}  & SWW & 34 & 18.9 & & 19 & 12.8 & \\ \hline \hline \end{tabular}  _Note:_: Iserve to body zone; NA: not available; T: serve to T zone; W: serve to wide zone; LN: long rally; MD: medium rally; SH: short rally; HZ1-HZ4: hitting zones 1 to 4; SZ: service zone (ace or double fault); ACE: ace (direct point from serve); BH: backhand; FH: forehand; OTH: other stroke; BSO: baseline out; SLO: sideline out; NET: ball into the net; FZ1-FZ5: finish zones 1 to 5; RW: receiver wins; SW: server wins with RFFE: receiver wins with forced error; RWUE: receiver wins with unforced error; SWUE: server wins with unforced error; SWUE: server wins with unforced error; SWW server wins with unforced;The adjusted residues provided detailed information on serve patterns. From the advantage side, there was a higher proportion of serves directed to the body and wide zones (adjusted residues of 1.9 and 4.9, respectively), while serves directed to the T zone were significantly less frequent (\(-\)7.3). Conversely, from the deuce side, throws to the T-zone were more common (adjusted residual of 7.3), while those directed to the body and wide zones were less frequent (\(-\)1.9 and \(-\)4.9, respectively). These findings reflect a differentiated pattern in the selection of the service zone depending on the side from which the serve is made. In relation to the length of the rallies, a higher proportion of long rallies (adjusted residual of 2.5) was observed from the deuce side, while medium rallies were less frequent (\(-\)1.6).