Barcelona's Lionel Messi watches his team mates during a training session at Stamford Bridge Stadium in London, Tuesday, April 17, 2012. Chelsea will play Barcelona at the stadium on Wednesday, in a Champions League semifinal soccer match.
A little coaching
Josep Guardiola, the Barcelona manager, shouts instructions to his players during their UEFA Champions League Semi Final first leg match against Chelsea.
Chelsea's Didier Drogba celebrates after scoring a tie-breaking 45' goal against Barcelona.
Head in the game
Chelsea's Branislav Ivanovic, top, fights for the ball with Barcelona's Adriano as he tries to head it.
Chelsea's Didier Drogba scores the go ahead goal during the EUFA Champions League semi-final first leg football match.
Didier is here
Chelsea's Didier Drogba, left, guards the ball from Barcelona's Carles Puyol, center, and Daniel Alves.
Six to watch
Chelsea travel to forbidding Camp Nou Tuesday with a real chance of catching a slumping Barcelona at exactly the right time. Carrying a 1-0 lead after their heroic defensive performance at Stamford Bridge, the Blues will be looking to repeat the feat and punch their ticket for the Munich final. Here’s six key people you must watch Tuesday.
Chelsea's Raul Meireles, center, argues a call with referee Felix Brych, right, as teammate Didier Drogba looks on.
Close, but no cigar
Chelsea's Gary Cahill, at center on ground, attempts to score the ball as Barcelona's goalkeeper Victor Valdes in yellow goes to clear it.
Eyes on the prize
Chelsea's Ramires, right, controls the ball as Barcelona's Daniel Alves looks on.
Chelsea has taken a surprising 1-0 lead into halftime over Lionel Messi and Barcelona in the first leg of their Champions League semifinals match.