Arsenal must avoid complacency and carry the intensity they showed in Wednesday’s win over Southampton into their three remaining games to achieve a top four finish in the Premier League, manager Arsene Wenger has said.

Arsenal’s 2-0 win at Southampton lifted them up to fifth place, three points behind fourth-placed City. While their final league position is dependent on the results of their rivals, Wenger said that his team must take it game by game.

“I don’t know more than you,” Wenger told reporters after the game.”It’s difficult to assess now after the game,” Wenger said. “He is walking properly. It was tight, but it was not a knife.”

“I didn’t see any incident where he had to stop in a sprint. It was more fatigue.

“It’s a hamstring problem, but we don’t know how bad it is.”

Arsenal travel to Stoke City on Saturday and could move four points clear of fellow top four contenders Manchester United, who face second-placed Tottenham Hotspur on Sunday.Midfielder Alex Oxlade-Chamberlain had picked up a hamstring injury but Wenger said that the injury was not serious.

“It’s difficult to assess now after the game,” Wenger said. “He is walking properly. It was tight, but it was not a knife.

“It’s a hamstring problem, but we don’t know how bad it is.”

Arsenal travel to Stoke City on Saturday and could move four points clear of fellow top four contenders Manchester United, who face second-placed Tottenham Hotspur on Sunday.