The Brazilian forward came on as a substitute and scored alongside Leandro Trossard in the second half at San Mames.

After the match, Martinelli expressed his happiness with the result and his own performance, saying, "I'm really happy with the result, the goal, and the assist as well. To win a game in Bilbao is really difficult, and I thought the team did really well, especially in the second half."

Martinelli also praised the team's ability to control parts of the game and described the atmosphere at San Mames as "amazing."

He acknowledged the difficulty of winning at Athletic Club's home stadium and said, "When you play for Arsenal, you go to win every game, so it's really good to start the campaign with the victory."

Martinelli concluded by emphasizing the importance of winning and the pride of playing for a big club like Arsenal.