London: Theo Walcott says Alexis Sanchez's ability to reproduce the form that terrorised Leicester holds the key to Arsenal's success in the Champions League. Sanchez netted a brilliant hat-trick to inspire Arsenal's 5-2 thrashing of Leicester on Saturday.


Arsenal's Theo Walcott (left) and Alexis Sanchez during their EPL match against Leicester. Pic/AFP 

The Chile winger hadn't scored for the Gunners since their FA Cup final win over Aston Villa in May and his early season form had been patchy as he struggled to recover from the draining experience of leading his country to the Copa America title in the close-season.