By FOX Sports Staff
The game appeared to be an even contest in the first 45 minutes as Chelsea rarely troubled home goalkeeper Jason Steele. Only Victor Moses impressed for the Blues as he kept making dangerous runs down the right while his fellow midfielders were effectively closed down by the Boro defence.
Whatever was said at half-time by interim manager Rafael Benitez worked wonders for them as they scored the opening goal in the 52nd minute after Ramires struck a ferocious shot straight down the middle although it appeared to be deflected by Fernando Torres on the way in.
Shortly afterwards, some good combination play between Moses, Oscar and Eden Hazard saw the Nigerian register Chelsea's second.
FOX Sports rates the performances of the players on both sides on Wednesday . The result also ensures that Benitez's side will now face Premier League leaders Manchester United in the FA Cup Sixth Round
Jason Steele - 7
Can't really be blamed for the two goals let in as they were unstoppable strikes and the product of some lapses of concentration on the part of his defence.
Nicky Bailey - 7
Took good care of Yossi Benayoun in the first half but could not hold his own against Eden Hazard in the second.
Stephen McManus - 7
McManus was commanding inside the box but was basically camped there for much of the game, thereby allowing the attackers too much space.
André Bikey (off 36') - 7.5
The Cameroonian had Torres in his pocket and used his stocky physical frame to good effect. Had to withdraw early in the game, though, with a hamstring injury.
George Friend - 6.5
Tried to be Chelsea's worst enemy but was repeatedly beaten for pace down their right flank. But to his credit, he did redeem himself by applying pressure and making it difficult for the attackers to send in a decent cross from the byline.
Faris Haroun - 7.5
Looked most likely to come up with an assist and ran with the ball with much gusto. However, he should have looked up more often and switched the ball to the opposing flank as his counterpart was often free of a marker. His tricks and swift runs did not amount to much in the end either.
Rhys Williams - 7
The captain was sent forward to play in a makeshift midfielder role after a series of injuries decimated Tony Mowbray's side and he acquitted himself well with a solid, if uninspired, showing.
Grant Leadbitter - 5
Easily the worst player for the home side as he had numerous free-kick opportunities but rarely did his deliveries connect with the head or foot of a fellow Middlesbrough player. Furthermore, his passes often went astrew and he was content with routine horizontal passes when through-balls would have been more advisable.
Curtis Main (off 62') - 6
Main was mainly a non-entity on the pitch.
Mustapha Carayol - 6.5
Didn't get as much of the ball as Haroun did but was unable to really trouble Ferreira despite the Portuguese's less-than acceptable performance.
Scott McDonald - 7.5
The 29-year-old looked like the better forward on the night as despite his inability to find the back of the net, he made the right runs and regularly helped build up play by getting onto the end of long balls, buying time for his side in the process.
Moreover, he did not try anything flashy and rarely lost the ball despite significant pressure. Managed to fire a couple of headers as well, much to the surprise of the Chelsea defence.
Seb Hines (on 36') - 6
Not an able replacement for the dominant Bikey.
Ishmael Miller (on 62') - 6.5
The former Manchester City player came on just as his team were pushed back on the backfoot and did his best to get them back into the game. His shot seven minutes before the end should have been struck more accurately, though.
Petr Cech - 7
Was rarely called to action in the game as despite their enthusiasm, Boro rarely kept their attempts on target.
Paulo Ferreira - 6
They say an old dog can't learn new tricks but Ferreira, whose last start for the team was back in May last year, really needs to improve his first touch if he's to make a push for a starting berth in the future. Quite often, he was robbed of the ball after struggling to get it under his control and his passing was also poor.
Branislav Ivanovic - 7
It was a tidy shift by the Serbian and he repeatedly headed out any incoming crosses.
John Terry - 7.5
The captain was back in action and he produced the effortless and composed display that instilled confidence into the rest of his side. Also sent in a lovely long ball to Fernando Torres in the second half that allowed the Spaniard to break free of the defence.
Ryan Bertrand - 7
Bertrand was not asked to do much as Chelsea's attack was mainly focused down the right flank. He should, however, have put an end to Haroun's dribbling with a biting challenge well before the Belgian reached the byline.
Ramires - 8
Placed in a holding midfielder role, the Brazilian showed once again why he's one of Chelsea's best attacking threats as he came up in the 'Frank Lampard' zone and smashed the ball in from the edge of the box to ease the pressure on his side. Effective also with his positioning, he intercepted many a pass and helped stifle the opposing side's counter-attacks.
Nathan Ake - 8
Ake was not even 18 when Chelsea won the Champions League last year but the young midfielder showed no sign of any youthful nerves as he bossed the midfield and even made a brilliant interception in the second half as he slid into the box to stop a left-wing cross.
The youngster will likely join Chelsea's contingent of players sent on loan next season, if the 20 players currently shipped out across Europe are any sign, but it would be a shame after this showing as he appears eager and ready to play his part for the first team in cup competitions.
Victor Moses (off 76') - 7.5
Worked tirelessly down the right flank and was the main outlet for Chelsea's attacks. His final delivery, though, was often found lacking and his dribbling, once a defender gets the hang of it, can be easily handled.
Oscar (off 79') - 8
Delighted the visiting fans with his array of quick turns and dribbles, he was the fulcrum for the Chelsea attack throughout the game. Showed great vision to pick out Hazard's run into the box that resulted in the second goal and went close to scoring a goal for himself shortly afterwards as well.
Yossi Benayoun (off 58') - 7
The Israeli was an anonymous figure for much of the game and was promptly removed after the restart in order to bring on a more energetic presence down the left flank.
Fernando Torres - 6
While noone can deny that Torres wants to score a goal, it seems like it's more likely to come from an inadvertent deflection off his back than any concerted attempt at getting one for himself. That speaks for itself, really.
Yet another frustrating showing by the striker although he did improve as the game went on.
Eden Hazard (on 58') - 7.5
Hazard was at his liveliest in the game and showed great skill to bamboozle the defenders during his brief cameo.
David Luiz (on 76') - 7
The defender played once more as a utility midfielder and was an imposing first line of defence for the Blues and helped reduce the intensity of the Boro attack in the closing stages of the game.
Marko Marin (on 79') - N/A
The German was brought too late into the game to really produce an impact.