Chelsea's top transfer target, Atletico Madrid marksman Diego Costa, could prevent them from lifting the Champions League trophy for the second time in three years. Costa has been on Chelsea's radar for a number of months and will be a key factor in helping Atletico reach the Champions League final, a target that was out of reach when they first drew Barcelona for the quarter finals.
After their stunning victory over two legs, Atletico have become a real danger to Chelsea as their performances in La Liga and Champions League have shown their true credentials. Chelsea boass Jose Mourinho would make history if he was to win the trophy this year, as he would become the first coach to win the trophy with three different clubs.
But it will be a difficult task for Mourinho and his side as they have to keep Costa and co. quiet for a minimum of 180 minutes. Chelsea are ready to activate Costa's £32 million release clause at the end of the season after Mourinho branded his current crop of forwards as "not real strikers."
The semi final clash could be a chance for Chelsea's strikers to prove themself to the Portugese coach. Fernando Torres returns to his boyhood club and will be hoping to net a few to boost his confidence. At the moment it seems as though his self belief has never been lower since he moved to London in 2011.
Costa has bagged 33 goals this season compared to the dissapointing nine goal tally for Torres, which is why he is behind fellow striker Sameul Eto'o and now Demba Ba in the Chelsea ranks.