Under normal circumstances, especially in CL, the away team will try their best to score because away goals are precious. GH is trying to use psychological tactics to get Blues into final:

1) The Blues are very much confident now because they manage to stop Barca and neutralize their attack.

2) With Ashley Cole coming back, and getting Puyol yellow carded, is a big morale boost for the Blues. Drogba will be very happy next leg.

3) Barca will be still be wondering what's going to be the way to penetrate our defense. (with them holding the ball 70% of the time, they have not found any flaw in the Blues defense yet). High ball from Alves doesn't work, Messi is neutralized, long range shot won't work, only way is fast through passes.