Former Arsenal striker Kevin Campbell was happy for Eddie Nketiah after his brace in victory at Chelsea.
The 4-2 win reignites Arsenal's top four push.
Campbell said, "It was very much needed, Arsenal dipped after the international break. I can't really put the finger on why - Crystal Palace, Brighton then Southampton was catastrophic.
"But I think Brighton doing Arsenal a favour on Saturday [by beating Tottenham] actually kept Arsenal in it and going into this game it could have been a fourth defeat in a row, which hasn't happened in so many years, but fair play to Mikel Arteta and the team.
"They came out and showed willingness, changed the system as well to start with, then reverted back to 4-4-2. It was a great day.
"I'm pleased for Eddie Nketiah. His contract is running down but he showed he's committed and to get two Premier League goals in such a big game to keep Arsenal on track was immense."
He also said: "I think it's all going to go down to the north London derby (12 May).
"I'm sure Spurs fans will have been looking at the Chelsea fixture thinking it's another defeat for Arsenal but Arsenal turned up and were worthy winners and now it's back on level pegging.
"It's a sprint to the finish, there are some big games coming up for Arsenal, there's a lot of football to be played."