According to 'El Tel', the Ivorian hitman could be the difference when the two sides meet on Tuesday...
The former Barcelona coach, who was at the Camp Nou from 1984-88, believes that Chelsea are the one team that could pose problems for the Catalans.
Writing in his column in The Sun, Venables said, "If Chelsea had played as they are now for the whole season, they would be fighting for the Premier League.
"They believe they wasted the first part of the season, and now they want to make up for it in the Champions League."
As far as the main threats for Chelsea, Venables has singled out Drogba as the man to watch, pointing to the striker's marked upswing in form since the club axed Luiz Felipe Scolari in February.
"Drogba has experienced a great change in attitude since [Guus] Hiddink arrived," he continued.
"He is the best forward in the league, even better than Fernando Torres. Barcelona are not scared of many players, but Drogba frightens them.
"His speed, his shot and his aggression make him a threat."
Venables finished by saying, "Few teams would have a hope in hell against Barcelona, but not many have a centre-forward like Drogba."
Chelsea travel to the Camp Nou for the first leg of the Champions League semi-final on Tuesday night.
Arjun Miglani, Goal.com