Hugo Lloris and Mauricio Pochettino insist that Spurs will not be taking their Europa League challenge lightly.
No arrests or injuries were reported from the violence hours before Thursday's game.
Julien Laurens previews the clash between brothers, Florentin and Paul Pogba, as St Etienne takes on Man United in the Europa League..
Tottenham's 2-0 defeat at Liverpool on Saturday left them without an away win against their top-six rivals this season and 10 points behind Chelsea.
Barca coach Luis Enrique is under enormous pressure after his team lost 4-0 at PSG in the first leg of the Champions League round-of-16.