Willian is happy to have scored his first goal for Arsenal.
The Brazilian struck Arsenal's third in their 3-1 win over West Brom, which relegated Sam Allardyce's side, curling home a spectacular free-kick in the 90th minute.
"It was difficult, I am the first to admit that," he said. "When I don't play well, I am the first to criticise. Me and my family know how difficult it was for me this season.
"But I never doubt what I can bring to this team — my quality, what I can do — and I finally scored this beautiful goal. Let's keeping going!
"[We scored] three fantastic goals and I am really happy with the performance and with the goal that I scored."
Willian also had praise for fellow goalscorer Emile Smith Rowe.
Willian said: "He is a fantastic player and I think he has a great future. He has technique and everything to become one of the best players in the League and I am happy for him."
