Messi did put Barcelona ahead in the 55th minute, however, courtesy of a deflected effort off Alexis, before the attacker made it 2-0 in the 66th minute with a powerful finish.
Read how it all unfolded in Sports Mole's minute-by-minute live commentary of the action below.
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ALAVES: Pacheco; Pedraza, Ely, Alexis, Vigaray; Manu, Pina; Wakaso, Ibai, Romero; Sobrino
BARCA: Ter Stegen; Vidal, Umtiti, Pique, Alba; Rakitic, Busquets, Iniesta; Roberto, Messi, Deulofeu
Mendizorroza Stadium 🏟 pic.twitter.com/oGCTMJ7rL9— FC Barcelona (@FCBarcelona) August 26, 2017