Atlético Madrid and Arsenal are set to face off in the first leg of their Champions League semi-final, marking a significant moment in their competitive history.

Context

This match is the fourth encounter between the two teams, with previous meetings including a Europa League semi-final and a league phase match this season.S1

Key points

• The match kicks off at 8pm BST.S1S2

• This is the first leg of the Champions League semi-final.S1

• Arsenal previously defeated Atlético in the league phase of this season's competition.S1

• In their last Europa League meeting, Atlético won 2-1 on aggregate.S1

• Mikel Arteta is the manager of Arsenal.S1

• The match is expected to draw significant attention from fans and analysts alike.S2

• Both teams have a history of competitive matches against each other.S1

• Live updates and commentary will be available during the match.S2

Why it matters

• This match could impact the trajectory of both teams in the Champions League.S1

• A strong performance could boost Arsenal's confidence in European competitions.S1

What to watch

• Monitor the performance of key players from both teams during the match.S1

• Follow the outcome of this semi-final tie for implications on the final.S1