The Chilean has yet to score in his first three appearances in a Gunners shirt but his manager is confident he will adapt successfully to English football
Arsene Wenger insists he has no worries over Alexis Sanchez's stuttering start to life at Arsenal.
Alexis completed a £35million move to the Emirates Stadium from Barcelona in July and has started all three of their competitive games so far this season.
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Alexis' replacement Olivier Giroud came on to give Arsenal more presence in attack and the France international headed home in the last minute of normal time to rescue a 2-2 draw.
Having signed Alexis after a season in which he scored 21 times in 54 games for Barcelona, Wenger insists he is not worried by the Chilean's sluggish start, putting it down to a lack of fitness after a punishing close-season schedule.
"At the moment he is not completely ready physically, but I do not worry for him," Wenger told reporters.
"He knows that he's not at his best physically but once he's at his best physically, the confidence will come back, it's all linked together.
"It's always difficult to know why the confidence is not at the best, I believe it is mainly physical."
Wenger also explained Giroud's omission from the starting XI and his decision to bring the 27-year-old on at the interval.
He added: "I have more strikers than before so sometimes I can give him a little rest. Giroud has just played one game since the World Cup so I gave him a little breather.
"But I knew we would be dominating the game in the second half and we would need some physical presence, we looked more dangerous because we were not in a counter-attacking situation, we were in a dominating situation and his presence was very important."