## 3 Results
### Countries That Participated in the Tournament
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{3}{*}{\begin{tabular}{c} **Country** \\ **(Participating in** \\ **the Tournament)** \\ \end{tabular} } & \multirow{3}{*}{\begin{tabular}{c} **\(\tau\)** \\ **(Changepoint,** **avg. Value and** \\ **95% CI)** \\ \end{tabular} } & \multirow{3}{*}{\begin{tabular}{c} **Diff** \\ **(Days Separating** \\ **\(\tau\) from First** \\ **Match)** \\ \end{tabular} } & \multirow{3}{*}{\begin{tabular}{c} **\(b_{1}\)** \\ **(Angular** \\ **Coefficient** \\ **before \(\tau\), avg. Value and** \\ **Value and 95% CI)** \\ \end{tabular} } & \multirow{3}{*}{\
\begin{tabular}{c} **\(b_{2}\)** \\ **(Angular** \\ **Coefficient** \\ **after \(\tau\), avg. Value and** \\ **95% CI)** \\ \end{tabular} } & \multirow{3}{*}{
\begin{tabular}{c} **a\({}_{1}\)** \\ **(Intercept** \\ **before \(\tau\),** **before \(\tau\), avg. Value and** \\ **95% CI)** \\ \end{tabular} } \\ \hline Austria & 36.4 & 20 & \(-\)0.05 & 0.08 & 6.28 \\  & (35.8, 37.1) & 20 & \((-\)0.06, \(-\)0.05) & (0.08, 0.09) & (6.25, 6.32) \\ Belgium & 24.9 & 20 & \(-\)0.06 & 0.04 & 7.70 \\  & (24.6, 25.2) & 10 & \((-\)0.06, \(-\)0.06) & (0.04, 0.04) & (7.68, 7.71) \\ Croatia & 28.7 & 20 & \(-\)0.06 & 0.02 & 5.87 \\  & (27.4, 30.3) & 13 & \((-\)0.06, \(-\)0.06) & (0.02, 0.03) & (5.83, 5.92) \\ Czechia & 26.2 & 9 & \(-\)0.06 & 0.02 & 6.30 \\  & (25.3, 27.2) & 9 & \((-\)0.06, \(-\)0.05) & (0.02, 0.03) & (6.26, 6.34) \\ Denmark & 28.2 & 20 & \(-\)0.06 & 0.05 & 7.13 \\  & (27.8, 28.6) & 13 & \((-\)0.06, \(-\)0.06) & (0.05, 0.06) & (7.11, 7.15) \\ Finland & 19.8 & 20 & \(-\)0.03 & 0.04 & 4.98 \\  & (18.4, 21.0) & 5 & \((-\)0.04, \(-\)0.03) & (0.04, 0.05) & (4.90, 5.05) \\ France & 34.7 & 20 & \(-\)0.06 & 0.11 & 9.28 \\  & (34.6, 34.8) & 17 & \((-\)0.06, \(-\)0.06) & (0.11, 0.11) & (9.28, 9.29) \\ Germany & 35.1 & 17 & \(-\)0.07 & 0.05 & 8.60 \\  & (34.6, 35.5) & 17 & \((-\)0.07, \(-\)0.07) & (0.05, 0.05) & (8.59, 8.62) \\ Hungary & 40.3 & 22 & \(-\)0.06 & 0.03 & 5.99 \\  & (38.4, 42.0) & 22 & \((-\)0.06, \(-\)0.06) & (0.02, 0.05) & (5.95, 6.03) \\ Italy & 36.5 & 20 & \(-\)0.05 & 0.09 & 8.25 \\  & (36.3, 36.8) & 23 & \((-\)0.05, \(-\)0.05) & (0.09, 0.10) & (8.24, 8.26) \\ Netherlands & 26.4 & 20 & \(-\)0.06 & 0.09 & 8.18 \\  & (26.2, 26.6) & 10 & \((-\)0.06, \(-\)0.06) & (0.09, 0.09) & (8.17, 8.20) \\ N. Macedonia & 34.8 & 20 & \(-\)0.05 & 0.05 & 3.59 \\  & (31.9, 37.6) & 19 & \((-\)0.05, \(-\)0.04) & (0.04, 0.07) & (3.46, 3.72) \\ Poland & 35.2 & 20 & \(-\)0.07 & 0.01 & 6.92 \\  & (33.5, 36.8) & 18 & \((-\)0.07, \(-\)0.07) & (\(-\)0.00, 0.01) & (6.89, 6.94) \\ Slovakia & 39.4 & 20 & \(-\)0.05 & 0.02 & 5.02 \\  & (36.8, 42.1) & 22 & \((-\)0.05, \(-\)0.04) & (0.00, 0.03) & (4.96, 5.08) \\ Spain & 24.9 & 20 & \(-\)0.01 & 0.07 & 8.45 \\  & (24.8, 25.0) & 8 & \((-\)0.01, \(-\)0.01) & (0.06, 0.07) & (8.44, 8.46) \\ Switzerland & 32.9 & 20 & \(-\)0.07 & 0.08 & 6.93 \\  & (32.5, 33.5) & 18 & \((-\)0.07, \(-\)0.07) & (0.08, 0.08) & (6.91, 6.96) \\ Ukraine & 25.8 & 20 & \(-\)0.05 & 0.00 & 8.06 \\  & (25.1, 26.5) & 10 & \((-\)0.05, \(-\)0.05) & (0.00, 0.01) & (8.04, 8.07) \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Countries with a changepoint coincidental with a reversal from a decrease to an increase in the SARS-COV-2 case rate that occurred during the European football championship. In the _diff_ column, instead, we listed the difference, in terms of days, between the point in time when the changepoint occurred and the date of the first match played by that given national team. The fourth and fifth columns of Table 1 show the mean values (with the corresponding 95% CI) for the coefficients \(b_{1}\) and \(b_{2}\), that have been used to compute the steepness of the slopes, respectively, before and after the changepoint. The sixth column, finally, reports the average value of the first intercept \(a_{1}\), with its 95% CI.