Tomas Rosicky has called on Arsenal to carry their European form into the Premier League.
The Gunners have won all three of their UEFA Champions League group games so far, scoring 14 goals in the process.
Their latest success came on Tuesday with an impressive 5-1 victory over in-form Shakhtar Donetsk, but it has been a different story on the domestic front.
While Arsenal have recorded emphatic wins against Blackpool and Bolton, at other times they have struggled to finish teams off.
With a five-point gap to make up on leaders Chelsea, where Arsenal lost 2-0 earlier this month, Rosicky is demanding more of a cutting edge.
"We are already five points behind in the league, but against Shakhtar it was a kind of game when we were clinical in front of the goal," he said.
"That is what we were missing, for example, against Chelsea.
"If Chelsea have one chance, they kill you immediately, so I am happy that we showed we could against Shakhtar.
"We were very productive, almost every chance we got, we scored.
"But it's about showing it in the Premier League as well."
Arsenal face another test of their title credentials with a trip to Manchester City on Sunday and Rosicky does not want any more excuses about playing well without getting the result.
He explained: "Everyone realises how it is. We cannot always say 'we are unlucky'. It doesn't work like that. It is time to prove we can win those games.
"We need to finally show it on the pitch and we have a great opportunity to do it on Sunday."
Rosicky, 30, feels it is no surprise to see City challenging at the top, given the amount of money they have spent.
"They are a tough team if you see them play. They are tactically very good," he said.
"Sometimes they are not so entertaining, but they are a little bit similar to Chelsea - they play great in defence, they are very solid at the back, so we need a good performance and we need to be clinical."