Had nothing to do against his former club, but was left helplessly exposed by his defence for Lafata's goal.
Had no direct opponent pushing him back on the left, but could not exert much influence when bombing forward.
Rarely tested defensively, but the quality of his deliveries from the right was invariably poor.
Too slow to react to Matejovsky's quick free kick, allowing Kadlec to get away from him, turn and feed Lafata for the Sparta opener.
For all his fabled influence and organisational skills, he could not convey the need for urgency to his team-mates until they fell behind. A threat in the opposition penalty area though.
As always, his team's brightest spark, and a delight to watch. Put a couple of chances on plate for Torres, but unfortunately stopped short of filling the fork and jamming it into the £50 million man's mouth.
Some inspired touches and clever movement as ever and, along with Mata, looked Chelsea's greatest attacking threat but much of his neat approach play was wasted on the abysmal Torres.
Showed impressive skill and strength in keeping the ball under pressure, but did not trouble the Sparta defence as often as Mata or Oscar.
Gave away the needless foul which enabled Matejovsky to initiate the move which led to Sparta's opener. Showed more urgency thereafter, though, and pace stretching the visitors' defence on several occasions. Was unlucky to rattle the post just after the break.
J. Obi Mikel
Played the simple passes with typical calm and accuracy, and rarely lost the ball in a damaging area.
Another performance more suited to a pantomime than a professional football match. From the moment he missed an early half-chance by inches the confidence drained away, and what ensued might have been hilarious were it not so strange or sad. Luck, too deserted him in his better moments, but there can be no more excuses. The panto season has long since past, and it appears Torres' time has, too.
Untested by a woefully wasteful Torres in the first half, he made some decent saves to deny the Blues an equaliser in the second. Could do nothing about Hazard's sensational strike.
Fared no better against Torres than his central defensive partner, and Sparta's clean sheet was little thanks to him.
Troubled by Torres' movement, rescued by the Spaniard's finishing. One suspects he might have been embarrassed by a proper striker.
Oscar glided and jinked past him on numerous occasions, and Hazard toyed with him with similar disdain. Embarrassed again for the goal.
Tormented by Mata whenever he hugged the right flank, and must surely have been relieved when the inspired Spaniard drifted into the middle, away from him.
Used the ball intelligently in the centre of midfield. Showed quick-thinking to slide the ball into Kadlec in the build-up to Lafata's opener, and might have made the tie very interesting had he not fired a foot past the post midway through the second half.
Was allowed far too much room to string passes together in the first half, overrun in the second as Chelsea's midfield decided to turn up.
Not the most influential or effective member of the Sparta midfield, but worked his socks off at both ends of the pitch.
Was alert to Matejovsky's intentions to latch onto his quick free kick, and showed good presence of mind to pick out Lafata.
Worked back well to defend his full-back and surged forward whenever he could to give his team an outlet on the counter.
Ensured the Chelsea backline had no time on the ball in the first half, even getting a yellow card for his enthusiasm, but not before he was on hand to tap home a crucial away goal for his side.