Barcelona coach Tata Martino feels "possession" will be key against Champions League opponents Manchester City. Barca are at the Etihad for the first-leg.

"Maintaining possession benefits us and it reduces City's chances," he said.

"They are a dangerous team. The fact that they're the highest scoring team in the Premier League shows that they are difficult to control, and when we have to defend, we'll defend. The best way to counteract them is to take the ball away from them."