Pepe scored and also produced an assist for the 2-0 triumph.
At the final whistle, he told Canal+: “I tried to do my best.
"Today, the team was solid, we were determined. We made an effort together. We did not concede a goal. It doesn't happen every day.
"(Mikel) Arteta has brought back his vision of the game. We run, we tackle together. We are a team.
"We showed solidarity."