Arsenal's narrow 1-0 victory over Sporting in Lisbon has given them the upper hand in their Champions League quarter-final tie, but there is still work to be done in the second leg at the Emirates Stadium. Portuguese coach Pepa assesses the key tactical aspects of the first match and explains why Sporting could still cause an upset.

The first leg was a closely contested game between two excellent teams, with few clear goal-scoring opportunities, but several interesting tactical and technical aspects. Arsenal demonstrated their ability to maintain structural compactness in a 4-4-2 shape, effectively closing central spaces and exhibiting strong physicality in their pressing triggers. In contrast, Sporting delivered a positive performance, showcasing their dynamic defensive structure and strong character. To succeed in the second leg, Sporting must remain true to themselves, imposing their strengths and being more focused, consistent, and effective than in the first match.

The recovery of injured players, such as Morten Hjulmand, and the importance of set-pieces could be decisive factors in the outcome of the match.