Champions League wrap: Lionel Messi the hat-trick hero on opening night

Lionel Messi notched a hat-trick as Barcelona bounced back from their shock weekend defeat to Alaves by hammering Celtic 7-0 in their Champions League opener on Tuesday night.

Luis Enrique's men were stunned 2-1 by newly-promoted Alaves at the Nou Camp in LaLiga on Saturday, but made amends by recording their biggest Champions League victory.