Barcelona take on Borussia Dortmund in the Champions League on Tuesday evening.

The players have already landed in Germany and are gearing up for the opening clash of their Champions League group at Signal Iduna Park.

Facing the Yellow Wall will be a tall task, with Dortmund currently second in the Bundesliga with nine points from four games.

The good news, though, is that Lionel Messi has been declared fit by the club's medical department and has also travelled with the squad.

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Ernesto Valverde, however, refused to give a definitive answer on the Argentine's situation, insisting that he and his staff would make a decision on his inclusion in the starting XI on the day of the game.

This has left many fans divided - some are eager to see Messi play and have even proclaimed they won't watch the game if he doesn't participate.

Others have a slightly different opinion: they seem to think Messi shouldn't really be risked and he should only be introduced in the second half as a substitute.

You can see their mixed reactions in some of the tweets down below: