Arsenal won convincingly with a score of 3:0 on Tuesday night against Slavia Prague.
This match was in the fourth round of the Champions League group stage.
Bukayo Saka opened the scoring in the 32nd minute. He was accurate from the penalty spot.
Mikel Merino scored the last two goals for the Gunners.
Spaniard Merino initially scored in the 46th minute to make it 2:0, while he scored the third goal in the 68th minute.
For Arsenal it was their fourth consecutive victory in the Champions League.
For Slavia Prague, it was their second defeat. They still haven't won a game, and they also have two draws.
Arsenal's next Champions League match is on November 26 against Bayern Munich.
Slavia Prague hosts Athletic Bilbao a day earlier.