The first west London derby at Stamford Bridge between our two sides in seven decades will decide who will find themselves three steps from Wembley. Former Blues winger Clive Walker hopes it's Chelsea.
'The team have to learn lessons from the first away game. The fact that it was a 2-2 draw against a League One side is all the proof you need that mistakes were made.
'Brentford were a matter of minutes from turfing the holders out of the FA Cup and I am sure their manager will be reminding them how close they were ahead of this replay.
'It was not a great pitch at Griffin Park because of the heavy rain and snow and they adapted better than we did.
'When you're playing a lower league side you know you have the better quality and they are more likely to make mistakes. Errors hurt you most at the back and if you put the ball in their court they will slip up more than you.
'In the first game Chelsea didn't work the ball into the final third quickly enough - lots of tentative square passing that was not suited to the playing surface. Brentford are not at the level they are by accident though they are not mugs, but it was sheer drive and adrenalin that was getting them to the first and second ball before our lads.
'I covered the Prague game and the centre of defence still looked a little vulnerable. We look susceptible to movement and searching balls and Uwe Rösler, the Brentford manager, will know that.
'In my career at Woking I remember in 1996 we played Coventry City in the FA Cup third round when we were in the Conference and they were Premier League. We took 5,000 fans to Highfield Road and drew 1-1.
'The replay was midweek, a winter evening match at our little non-league ground. Apparently - we found out afterwards - they were petrified about losing. As it happened they beat us 2-1 with a late own goal - what a gutting way to go out.
'We were very unfortunate and their edginess was highlighted to us after the final whistle. Our goalie had had a few words with their skipper Gary McAllister and at the end McAllister bundled into our dressing room to continue the row. They were still rattled and he lost the plot. That's how the cup gets to people.
'Gordon Strachan had been in the manager's job a few weeks and he told me years later it was one of the worst ever games for him.
'Rösler will be instilling in his players the thought that they were seven minutes away from beating usand that they can go one better on Sunday. But not all players have the confidence to take that on board - that they can beat the European champions over 180 minutes. Some won't believe it and will not be able to perform to the same level as before.
'At Griffin Park their midfield worked very hard and moved the ball forward well, causing problems. Adam Forshaw and Jonathon Douglas did a great job and ran themselves into the ground.
'Clayton Donaldson fed sub Tom Adeyemi almost unchallenged for the penalty awarded and Chelsea will be looking to avoid that type of scenario. Paul Hayes scored at the Bridge when he was with Scunthorpe during the José Mourinho era, though we eventually came back to win 3-1. So they are far from toothless. Their keeper Simon Moore will also be hoping he is as secure as in the first match.
'Of course the circumstances are different. It's our pitch, our fans, and it will be intimidating to them - they may feel their lifetime's chance has passed. The surprise element has gone.
'The pitch was difficult and only Oscar really dealt with it for us with that great dribbled goal, - similar to the one at Prague. Petr Cech's presence will make a big difference in this game, and Demba Ba had an impact, setting up Fernando Torres's late equaliser.
'This will have pleased Rafa Benitez no end because it gives him more choices over, as ever, a busy schedule. After this we face Sparta at home on Thursday, then a massive game away to Man City next Sunday.
'We have to respect Brentford but the manager will want to field strong sides against our Europa League and Premier League opponents. John Terry may well start today and there is likely to be some experience as well as a run out for less regular players. Ryan Bertrand, Marko Marin and Yossi Benayoun are in the running for places, as are the Nigerians.
'The likes of Nathan Ake and George Saville deserve some time on the pitch but perhaps not until, hopefully, a few Chelsea goals have gone in.
'Whoever plays, there are no excuses not to be on the mark. We should finish this sort of game very quickly with the right mental attitude.'
Squad fitness news
Only Oriol Romeu (knee) is unavailable for Chelsea. Brentford have no fresh injury concerns. Striker Farid El-Alagui and midfielder Kevin O'Connor have long-term injuries.
Click on tabs above for more briefing.
Chelsea in the FA Cup
Winners: 1970, 1997, 2000, 2007, 2009, 2010, 2012
Runners-up: 1915, 1967, 1994, 2002
Semi-finalists: 1911, 1920, 1932, 1950, 1952, 1965, 1966, 1996, 2006
Bobby Campbell was our manager 23 years ago the last time the Blues were knocked out by a third--tier club. Bristol City won 3-1 in January 1990 at a wet Ashton Gate in the fourth round. Kevin Wilson was our scorer.
Chelsea have won three of our last five penalty shoot-outs, the last being at the Allianz Arena at the end of the Champions League final against Bayern Munich.
Last 10 seasons in the FA Cup
2002/03 - Quarter-final
2003/04 - 5th round
2004/05 - 5th round
2005/06 - Semi-final
2006/07 - Winners
2007/08 - Quarter-final
2008/09 - Winners
2009/10 - Winners
2010/11 - 4th round
2011/12 - Winners
At Southampton in the last round, Frank Lampard drew level with our all-time FA Cup scorer Bobby Tambling on 25 goals.
|Last six results|
|Jan 23||Swansea (League Cup SF 2 a)||D 0-0|
|Jan 27||Brentford (FA Cup 4 a)||D 2-2|
|Jan 30||Reading (a)||D 2-2|
|Feb 2||Newcastle (a)||L 2-3|
|Feb 9||Wigan (h)||W 4-1|
|Feb 14||Sparta Prague (Europa League a)||W 1-0|
Scorers Mata 16, Torres 15 (1 pen), Lampard 12 (5 pens), E Hazard 9 (2 pens), Oscar 8 (1 pen), Cahill 6, Ivanovic 6, Ramires 6, Moses 5, D Luiz 4 (2 pens), Ba 3, Bertrand 2, Sturridge 2, Cole 1, Marin 1, Romeu 1 (pen), Terry 1, own goals 3. Total 101
|Chelsea's next three games|
|Thu 21 Feb||Sparta Prague (Europa League) home||8.05pm|
|Sun 24 Feb||Manchester City away||1.30pm|
|Sat 2 Mar||West Brom home||3pm|
Frank Lampard needs a brace to reach 200 goals for Chelsea and four to equal our all-time top scorer Bobby Tambling.
Congratulations to Nathan Ake who celebrates his 18th birthday on Monday
Brentford in the FA Cup
Furthest reached is the quarter-finals: 1937/38, 1945/46, 1948/49, 1988/89.
They have only reached the FA Cup fifth round on six occasions since the Second World War.
|This season's FA Cup campaign|