Drogba hits winner as chelsea defeat Barcelona   Chelsea produced the kind of "perfect'' performance Roberto Di Matteo had demanded to inflict Barcelona's first Champions League defeat of the season and give themselves real hope of reaching the final.

  The first leg was played in  Stamford Bridge,Interim boss Di Matteo's plan paid off spectacularly, Didier Drogba scoring the winner to go some way to burying the demons of the sides' last meeting three years ago. The Catalans dominated possession as well as creating a succession of chances - but Drogba struck in first-half injury time to give interim manager Roberto di Matteo's side an advantage to protect in Barcelona next Tuesday.                                                    Chelsea were forced to mount a resilient rearguard action in the face of Barcelona's famous passing "carousel", but Drogba converted their one clear chance to reward the outstanding defensive work of Gary Cahill, Ashley Cole and captain John Terry in keeping Lionel Messi and co at bay.

               Barcelona produced evidence of the huge threat they will pose in front of their own supporters as they enjoyed 72% of the possession, but Chelsea will be elated at not only claiming the victory but also keeping a crucial clean sheet.

Alexis Sanchez hit the crossbar for Barcelona early on and Pedro hit the post in the dying seconds - while Cole cleared off the line from Cesc Fabregas. Goalkeeper Petr Cech also saved well from Messi and Carles Puyol as Pep Guardiola's team tried every avenue in an attempt to break Chelsea down.

In the end, Chelsea's organisation and discipline was rewarded but Di Matteo knows they will have to produce the same - and more besides - in the Nou Camp to confirm a meeting with either Real Madrid or Bayern Munich in the final in Munich next month.The pattern of the match was set the moment the visitors kicked off, Chelsea allowing them possession and Raul Meireles leading the pressure behind Drogba.Luck played a part in the first of them in the ninth minute, Alexis Sanchez chipping against the crossbar from Andres Iniesta's perfectly-timed pass.
           The other two both fell to Cesc Fabregas courtesy of Lionel Messi, who was otherwise restricted to a quiet half.

The first was a sitter, Fabregas failing to connect properly with his finish after Messi's burst and pass had set up Andres Iniesta for a shot Petr Cech parried.

Messi finally had the chance to build up a real head of steam two minutes before half-time, Fabregas this time producing a delightful dink which was only kept out by Ashley Cole's clearance off the line.

Otherwise Chelsea had plenty to give them hope from what little ball they had.

The benefit of going long was quickly demonstrated when only a heavy touch prevented Drogba capitalising on Cech's clearance.

Drogba, who got away with overstepping the mark when he trod on Sergio Busquets' foot, also failed to make the most of a one-on-one with Carles Puyol.

Long throws predictably unsettled Barca, too, and Gary Cahill almost took advantage of the first of them.

Chelsea did tread a fine line discipline-wise, with Meireles lucky not to pick up a booking that would see him suspended for the second leg.

"Same old Barca, always cheating,'' chanted the home fans whenever a Barca player went down.

They were in good spirits despite the deluge, which may have played a part in Drogba scoring with the final kick of the first half.

Barca were caught upfield and Frank Lampard's ball over the top sent Ramires rampaging forward, the Brazilian's cross picking out Drogba.

Victor Valdes should have saved the scuffed finish but could only help it into the net.

Barca were even more dominant after the restart, Cech parrying Adriano's curler before Sanchez missed another gilt-edge chance when he stabbed Fabregas' scooped pass wide from six yards.

Otherwise they were being kept at bay by a world-class defensive display led by Cahill and John Terry, who were almost single-handedly keeping Messi quiet.

Pep Guardiola sent on Pedro for Sanchez with 24 minutes remaining, with Barca becoming increasingly frustrated, not least with perceived play-acting from Drogba, who got an earful from Puyol.

There was finally a booking when Ramires tripped Messi in full flight, Pedro quickly following for a similar offence on Cole.

Busquets was also cautioned for scything down Ramires after Juan Mata was withdrawn for Salomon Kalou.

Fabregas left the field to a chorus of boos for Thiago Alcantara as Chelsea began to drop deeper and deeper, as they had done three years earlier.

Barca laid siege to the Blues goal and Cech produced a magnificent save three minutes' from time when Puyol glanced Messi's free-kick towards the corner.

And, in stoppage-time, the visitors saved their worst finish until last, Busquets skying high over the crossbar after Pedro's effort had hit the post.it was trully an interesting encounter