Laporta, who was previously Barca president between 2003 and 2010, was voted on by club members last weekend but had to secure a € 125million bank guarantee before being inaugurated.
Now in office, one of his first tasks is to convince Messi, who turns 34 in June, to extend his contract, which expires the same month, beyond the end of the season.
Messi, who wanted to leave last summer, voted in last Sunday’s election and was seated in front of Laporta as he delivered his speech at Camp Nou on Wednesday in front of around 300 guests.
“I take the opportunity to say again that I will try to convince Leo (Messi) to stay with us. This is a must-do task, I will do whatever I can. He knows it.
“Whatever he does it will be OK but we will try to make him stay because he is the best player in football history. ”
“And my apologies Leo, for saying that here and now, but you know my love for you, Barca love you very much and if this stadium was full in the next game I’m sure you wouldn’t be able to leave . ”
Laporta faces a tall order not only to keep Messi but also to reverse the club’s financial woes.
“It is true that the club’s economic situation is the source of concern for all Barça associates and us too and this is our priority,” added Laporta.
“To make Barça economically viable again, that’s why we have a shock plan that we are going to implement. We know how to do it, it will mean putting in effort and hard work.
“Now that we have the power to make decisions, we will try to generate new sources of income. We will try to make the right decisions to reverse the current situation. ”