Arsenal fear Ramsey could be out for at least a month

English football club Arsenal fears midfielder Aaron Ramsey is set to be out for at least four weeks after suffering a hamstring injury against Leicester City Wednesday.

Ramsey lasted only nine minutes before succumbing to a third hamstring strain of the campaign -- with Mathieu Flamini taking the 24-year-old's position, reports dailymail.co.uk.

Speaking of Ramsey's injury after Arsenal's 2-1 Premier League win against Leicester, Arsene Wenger said: "I cannot say it is not a worry, It is not good news."

Arsenal are also sweating on the fitness of star striker Alexis Sanchez. The Chilean started the midweek clash at the Emirates Stadium, after returning from a hamstring injury. But he hurt his left knee and was under-par until he was replaced in the 68th minute by French striker Olivier Giroud.

The incident came following a tackle by Leicester defender Matthew Upson, that left the 26-year-old nursing his knee with ice once he was substituted.

After the game, Sanchez later tweeted, hinting that his injury may have been more than a "knock" as Wenger claimed.

"Sometimes the love for the game and anxiety to be on a football pitch works against you," he tweeted.