Striker Barcelona and the national team of Argentina Lionel Messi is sure that he still has much to grow in the game plan.

Despite the numerous bombardier records of Messi, he is sometimes criticized for not the best execution of a penalty.

The Argentinian himself is aware of his weakness and intends to work on this component of the game.

"I have to work harder to get closer to perfection".

"There are some moments in which I have not yet reached my maximum. For example, the execution of a penalty. I need to continue to work on this, "- admitted Messi Blic Online.

Last year, in Messi's passive three unrealized penalties in La Liga.