It's a demolition derby in the Barcelona penalty area. While going up for a 50-50 (or 33-33-33?) header, all of Gerard Pique, Victor Valdes and Didier Drogba managed to clatter into each other, causing a rather long delay as medical staff for both teams had to come onto the pitch. Pique appeared to take the worst damage of the three, with Valdes making some decent contact with his head, but all three players were able to continue.
Shortly afterwards, Barcelona put together a brilliant attack, but were denied by Petr Cech and John Terry. Lionel Messi got a shot on target in the 19th minute after a great little flick from Cesc Fabregas, but Cech saved from 10 yards. A rebound went to the edge of the box and John Terry blocked Andres Iniesta's follow-up effort.
We'll have live coverage throughout the game in our Barcelona vs. Chelsea, 2012 UEFA Champions League StoryStream. For more on the two teams, head over to Chelsea FC blog We Ain't Got No History and FC Barcelona blog Barca Blaugranes.