Barcelona boss Luis Enrique says Lionel Messi has proven to be unstoppable when he has reached top form.
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The Argentina captain struck a hat trick in Barca's 4-0 victory over Manchester City in Wednesday's Champions League clash at Camp Nou.
Messi has 12 goals and six assists from just 10 appearances this season, with four of those strikes coming in the two matches since his return from a groin injury.
Speaking ahead of his side's La Liga trip to Valencia, Luis Enrique has backed the 29-year-old to continue his stellar run.