Aaron Ramsey
Aaron Ramsey has been ruled out of action for a month following the recurrence of a hamstring injury. (Getty Images)

Arsenal have suffered a massive blow as midfielder Aaron Ramsey is reportedly set to miss at least four weeks with a hamstring injury he picked up during the Gunners' win over Leicester City on Tuesday night.

According to the Telegraph, the Welsh midfielder, who limped out ten minutes after coming on as a substitute, will be out till after the north London club's last-16 tie against Monaco in the Champions League.

The current setback is Ramsey's third hamstring injury of the season, with the previous two occurring against Tottenham in September and Borussia Dortmund in November. The latter kept the Welsh international out for almost six weeks, and he has only played five games since his return.

Arsene Wenger has expressed his concern over the recurrence of the same injury and believes that a muscle injury this far into the season will hamper the player's ability to recover fully before the end of the campaign.

"Once you go into February, if you have a muscular injury and a guy has a setback, you say 'bye bye' as the season is over, as it is six weeks out," Wenger said, as quoted by the Telegraph.

The Frenchman also admitted that bringing on Ramsey was not his best decision, but added that his introduction was needed as the Gunners needed further offensive impetus in their game against the Foxes.

However, there is some good news on the injury front, as the report suggests that Alexis Sanchez, who was also substituted with what looked like a knee injury, will be fit by the end of the week and could make the squad for Arsenal's FA Cup game against Middlesbrough.

But it is believed that Wenger might opt to rest him ahead of more important clashes later in the month, including a Champions League last-16 tie against Monaco. The Chilean forward has himself revealed after the game that, he might have rushed back to action.

On the other hand, Jack Wilshere could be included in the squad to face Boro, after the midfielder returned to full training following three months out with an ankle injury.