Chelsea too win before extra time kicks in.
I see this as the best low risk bet this weekend.
Chelsea was completely dominating the first game, it is unlikely that Brentford will overcome this pressure once more. Benitz has got back 4 players: David Luiz, Demba ba, Victor Moses and John Obi Mikel, last 2 players are comming with confidence after winning Africa nations Cup. Chelsea are not seeing any significant injuries or have any suspensions for this game. Benitz states to Chelsea FC website that:"Rafael Benitez will welcome back four players into his squad for Sunday's game against Brentford at Stamford Bridge, and promises a strong line-up as we pursue a place in the last 16 of the FA Cup.". So Benitz, hungry for some succes, will not be starting with all the reserves, it will be the A-Team.
I see Brentford´s only chance as trying to play very defensive and hope for a lucky counter-attack. I know very litle about this team but from the first game I see their primary strenght as their will to fight and win. This will not be enough to beat Chelsea at Stamford Bridge.
There is however some unsurtainty, as Brentford will be very defensive and Chelsea having some difficulties scoring and Benitz knows this:"Speaking after Thursday's narrow win, Benitez suggested we need to be more clinical in attack. Today he explained a little more behind his thinking.". Chelsea is focusing on the offensive so I believe they will win, but with a 1 or 2 goal margin only, so I suggest NOT taking bets that rely on lots of goals for this game.