ESPN FC's Paul Mariner and Mark Donaldson preview the upcoming Champions League clash between Arsenal and Barcelona.

Arsenal's Olivier Giroud spoke about the pressure that comes with being a footballer ahead of their UCL clash with Barca.

Barcelona head coach Luis Enrique has hailed Lionel Messi as Barcelona's leader, stating he can play in many positions. Arsenal midfielder Santi Cazorla says Barcelona's front three of Lionel Messi, Neymar and Luis Suarez are "incredible," but that the trio are backed up by quality players everywhere on the pitch.
Barca travel to Arsenal for Tuesday's Champions League round-of-16 first leg with pundits raving about the Catalan side's all-South American attacking trident.
Between them, the trio have scored 75 times in Barca's last 32 games in all competitions — a run which has brought not one defeat and seen Luis…