Bayer Leverkusen is clearly favorite here.

They are in amazing form, unbeaten in the last 9 games across all competitions with 7 victories in a row, scoring 24 goals which makes almost 3 per game. The team is playing very well, with solid performances, and right now are the most in-form team in the Bundesliga, above leaders Bayern Munich, Borussia or Union Berlin.

They have not been able to beat Brugge in the Champions League group stage, but in that period they were in much worse form (with just 2 victories in 14 games across all competitions), lacking confidence and with poor performances in Bundesliga too.

Recently, they outplayed Ferencvaros winning 2:0 and 0:2, while in the previous round outplayed and deservedly beat (in penalties) Monaco, after having more xG in both games.

On the other hand, Union Saint-Gilloise is one of the big surprises this season. Were not able to qualify in the Champions League against Rangers, but in the group stage of the Europa League were able to qualify as leaders in a group above Union Berlin, Braga and Malmo.

In ⅛ finals they played again against Union Berlin and beat them, but must remember that Union Berlin is in terrible form. When they played those games, they were in a middle of a crisis of results (which is still running now) without a single victory in 5 games, and losing many positions in the Bundesliga against weak teams, with poor performances. Furthermore, must remember that in November Bayer Leverkusen beat 5:0 Union Berlin.

Union Saint-Gilloise is probably one of the worst teams in the tournament now. They are a very small team with a low budget, who just two seasons ago were in 2nd division and managed to be leaders in the Jupiler Pro League last year (although lost the title against Brugge).

They are a really good team at the counters, use to play very defensive so surely for this match we’ll see Bayer Leverkusen controlling the game and possession and Union Saint-Gilloise trying to be dangerous at counters. But Leverkusen has good defenders with pace, able to stop or avoid counters. Furthermore, the German team has much more quality in the squad.

本译文使用有道机器翻译，仅供参考：

勒沃库森显然是最受欢迎的球队。

他们的状态令人惊叹，在过去的9场比赛中，他们在各项赛事中保持不败，并取得了7连胜，打进24球，平均每场比赛几乎3球。这支球队踢得非常好，表现稳定，目前是德甲状态最好的球队，超过了领头羊拜仁慕尼黑、保加利亚或柏林联盟。

他们没能在欧冠小组赛击败布鲁日，但在那段时间他们的状态要糟糕得多(各项赛事14场比赛仅取得2场胜利)，缺乏信心，在德甲的表现也很糟糕。

最近，他们以2:0和0:2的比分击败了费伦瓦洛斯，而在上一轮比赛中，他们在两场比赛中都有更多的xG，击败了摩纳哥(在点球大战中)，并当之无愧地击败了摩纳哥。

另一方面，圣吉卢瓦联盟是本赛季最大的惊喜之一。在欧冠对阵流浪者的比赛中未能出线，但在欧联杯小组赛中以小组头名的身份晋级，排在柏林联盟、布拉加和马尔默之前。

在决赛中，他们再次对阵柏林联盟队并击败了他们，但必须记住柏林联盟队的状态很糟糕。当他们踢这些比赛时，他们正处于5场比赛一胜未胜的结果危机之中(这种危机至今仍在持续)，并且在德甲联赛中输给了许多弱队，表现不佳。此外，必须记住在11月勒沃库森5:0击败柏林联盟。

圣吉卢瓦联盟可能是目前联赛中最差的球队之一。他们是一支非常小的球队，预算很低，两个赛季前还在乙级联赛，去年在朱庇勒职业联赛中排名第一(尽管在对阵布鲁日的比赛中失去了冠军)。

他们是一支非常擅长反击的球队，通常都非常防守，所以在这场比赛中，我们肯定会看到勒沃库森控制着比赛和控球权，而圣吉卢瓦则试图在反击中制造危险。但是勒沃库森有很好的防守球员，他们有能力阻止或避免反击。此外，德国队的阵容更有实力。