Holding a 1-0 advantage from the first leg at Stamford Bridge, Chelsea fell behind to Vincenzo Iaquinta's 19th-minute strike before the returning Michael Essien levelled the match on the stroke of half-time.

Alessandro Del Piero's penalty then put Juventus back in front on the night in the 74th minute before Drogba secured Chelsea's passage seven minutes from time.

With only a slim advantage from the first leg, Drogba admitted Chelsea's tactics were uncertain until Iaquinta made things clearer.

"We didn't really know what to do, if we should attack or not, so we played counter-attacking football," he told ITV. "When they scored, we decided to play our game so I think it was a good thing they scored.

"You always want to start out to win the game, but at some point it was difficult to take a decision and I think the goal really helped us."

After Essien levelled, Juve were given a lifeline when the referee awarded a penalty for a handball by Juliano Belletti that brought fierce protests from the Chelsea players.

"I think (the referee) was right but he didn't know who touched the ball so that's why there was a little trouble in the box," Drogba said.