Alexis Sanchez has made a big impact for Arsenal since joining . Mauricio Isla and Sanchez are both in the Chile squad to face Brazil at The Emirates later this month . Arsene Wenger is confident that his side can beat their hosts but he will be hoping they don't concede too many goals as they look to build on last weekend's win over West Ham United.
Alexis Sanchez has made a big impact for Arsenal since joining . Mauricio Isla and Sanchez are both in the Chile squad to face Brazil at The Emirates later this month . Isla wants revenge over Brazil after losing on penalties at the World Cup .