Barcelona's former Liverpool midfielder Javier Mascherano has fired a warning at Champions League opponents Arsenal.
Lionel Messi has failed to score in any of his seven matches in England but hit all four goals last season when Arsenal visited Barca - and Mascherano says his Argentina teammate can do the same again.
"Nothing surprises me about Leo," said the former Liverpool midfielder, who looks likely to start for Barcelona against Arsenal after defender Carles Puyol confirmed he will not be fit.
"He can repeat what he did last year or he could do even better. Nobody can put a limit on the levels he can reach."
