Barcelona defender Sergi Roberto admitted frustration after their 2-2 draw with Manchester United.

Roberto says they'll "have to improve" for the second-leg of their Europa League playoff at Old Trafford.

Our principal objective was to win the match," said Roberto.

"It wasn't to be. So to draw, at least, is better than losing. My team really competed right until the end. It's true that when you have a win in the bag the second leg looks better. "It was a night when both teams had lots of chances. Next week we'll have to improve.

"United are a team who love having the ball and that's made it a very intersting match. What a shame we couldn't win it."