Guus Hiddink's side managed to keep Josep Guardiola's free-scoring Barca off the scoreboard on Tuesday night, meaning victory at Stamford Bridge in the second leg will be enough to advance.
Terry admits it was hard work at Camp Nou trying to keep the likes of Samuel Eto'o, Thierry Henry and Lionel Messi quiet, but that the players are on a high following a superb performance.
The Blues skipper believes the job is far from done and that Chelsea will need to 'get in Barcelona's face' in the return leg at Stamford Bridge, if they are to secure back-to-back Champions League finals.
Brilliant"It's brilliant because you come away feeling really tired after the game, but there's nothing better than keeping one of the best sides in the world at bay," he told Sky Sports.
"I think we did that very well tonight. We'll walk away a bit tired, but we can be very pleased with the performance.
"I'm not too sure we have the advantage, but certainly we'll definitely take it. We've come here and not conceded.
"We'll get them back to the Bridge now and we go again. We regroup. It's a chance now for us to maybe get in their faces like they did to us.
"They didn't let us play. You need to stop them playing and I think we need to do that at the Bridge. With our fans behind us and if our players are up for it, then we've got a very good chance."