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Welshman Aaron Ramsey has been Arsenal's best player this season, but he has suffered with injury problems of late.
No. 1 on this list of season's regrets is the loss of another player to injury: Welsh midfield dynamo Aaron Ramsey.
The 23-year-old was in sensational form in the first half of the Premier League season, contributing hugely to Arsenal's impressive start; with Ramsey in the side, Arsenal won two thirds of their fixtures and quickly climbed the table.
As per Squawka, Ramsey scored eight goals in 18 league appearances for the club, and made six assists.
However, the midfielder hasn't featured for the club since the end of December, and Arsenal's form has been affected hugely by this loss.
Whilst Mesut Ozil, Santi Cazorla and Tomas Rosicky have contributed in patches in his absence, none have had the impact that the Welshman had earlier in the season.
Ramsey's injury has directly affected the form of Olivier Giroud also and, as detailed in the previous slide, the Frenchman has suffered without the support which Ramsey invariably provided.
Near a return to full fitness, Arsenal will be looking to Ramsey to produce the magic that he conjured in the early stages of the season as the North London club look to salvage a flagging league campaign.
Do you agree with this ranking? What will be Arsenal's biggest regret this season? Make your opinion heard in the comments below.