Barcelona's Lionel Messi celebrates after scoring during the Champions League Group C soccer match between Celtic and Barcelona at Celtic Park stadium in Glasgow, Scotland, Britain, Nov 23, 2016. [Photo/IC]

Lionel Messi steered Barcelona to a 13th straight appearance in the Champions League knockout stage, scoring both goals in a 2-0 win at Celtic as the Spanish team secured top spot in Group C on Wednesday.

Messi drove in a 24th-minute opener at Parkhead before converting a penalty in the 55th, putting him on nine goals already in four group games.

Five of those have come against Celtic, following his hat trick in Barcelona's 7-0 win at Camp Nou in September.

With Manchester City drawing at Borussia Moenchengladbach in the group's other game, Barcelona is four points clear of City and cannot be denied first place heading into the final round of matches in group play.

Celtic will finish last in the group and is out of Europe altogether.