Alexis Sanchez arrival at Arsenal was one which caused a major stir around the Emirates Stadium and his addition was expected to elevate them into title contention.
Sanchez has established himself as one of the best wingers in Europe following some fine form at Barcelona and there was great anticipation of him performing for the Gunners.
So far his form in an Arsenal shirt has been promising, if not spectacular, but he will face his toughest test in the Premier League to date on Sunday.
Arsene Wenger's side take on Chelsea at the weekend and they will be relying on Sanchez to be at his match-winning best if they are to come out on top.
The Chilean is capable of hurting any defence in the league, but he will have to be at the very top of his game if he is to cause Chelsea's backline to struggle.
The Blues have been far the best team in England over the opening of the season and they, indeed, have a wing-wizard of their own.
Eden Hazard has built a reputation as one of the most dangerous attackers in the nation's top-flight after some scintillating performance since arriving at Stamford Bridge back in 2012 and Sanchez still has some way to go to match the Belgian.
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Although Sanchez actually has more goals than Hazard, their have been disparity between the pair's general play so far.
Nobody in the league can compete with Hazard's dribbling prowess and his dominates this area, but he has also created more chances for his teammates and been far more accurate with his passing.
It highlights the quality that he possesses and the standards that Sanchez will still need to elevate his game to before he can be considered as dangerous as the Chelsea star.