Chelsea legend Gianfranco Zola has backed his former club to surprise Barcelona and qualify for the Champions League quarter-final stage.

The first-leg ended 1-1 at Stamford Bridge and Antonio Conte's will need to at least score at the Nou Camp if they want to advance.

"It's not going to be easy. Playing in Barcelona is a tough game. But Chelsea are a strong team, with good players," Zola told Omnisport .

"I think they can go there and surprise Barcelona, they have the ability to do that. Chelsea have the type of players Barcelona don't like very much, so in my opinion, it's still an open game.

"They will have to defend well. The first leg was 1-1, Barcelona will want to try to win the game [and not rely on the away goal advantage].

"I'm sure they will want to be safe. If Chelsea defend well first, then they can use the counter as they can do really well. I think they stand a very good chance."