Paris Saint-Germain (PSG) is set to begin its defense of the UEFA Champions League title this Wednesday evening at the Parc des Princes, where they will face Slovan Bratislava. Despite being the reigning champions, PSG faces an uphill battle this season. According to Opta, a sports data and analytics company, PSG has only a 7.1% chance of winning the competition, placing them fifth among teams like Arsenal, Bayern Munich, Manchester City, and Barcelona. This low probability is attributed to a challenging schedule and a slow start to the season, with PSG only securing one victory so far—against Aston Villa in the UEFA Super Cup. Opta's model calculates these odds by analyzing factors like betting odds, power rankings, and historical performance data. It simulates the entire tournament, from the group stage to the final. However, this model does not consider variables such as a team's potential to improve over the season. Luis Enrique, PSG’s coach, is banking on such improvement to achieve a historic third Champions League title by May 2025. Despite the low odds, some analysts, including the French newspaper L'Equipe, still consider PSG a strong contender this season. The difficulty of PSG’s group stage draws has also played a significant role in their low odds. In the past two seasons, they have faced strong teams like Barcelona, Bayern Munich, Tottenham, and Manchester City. Opta emphasizes that the group stage draw is the most critical factor in the Champions League, as a tough group can make it difficult to advance to the knockout stages. A challenging group reduces the chances of finishing in the top eight, which would require two additional knockout rounds before reaching the quarterfinals. Opta acknowledges that its model has limitations. It does not account for intangible factors like player fatigue or the ability of key players to perform under pressure. Whether PSG can defy these odds and win a third Champions League title remains uncertain. Only Real Madrid has achieved this feat, doing so three times in a row under Zinedine Zidane between 2015 and 2017. PSG’s quest for a third star is thus seen as a formidable challenge, but not impossible.