Lionel Messi admits Barcelona are struggling for form after their draw at Champions League opponents Stuttgart last night.

The defending champs needed a Zlatan Ibrahimovic equaliser to rescue a draw in their first-leg clash.

"For some time we have not been playing the same football as before," said Messi. "The passes that before were sticking, are now missing their mark.

"At halftime we knew we had to change our play to get a draw - and we did."