Speaking on Tuesday, Tebas said: 'Messi has a contract which has been renewed.
A four-year deal has been on the table for the diminutive Argentinian since the summer, but while terms have been agreed, he has not yet signed the contract.
"The contracts are official when they're signed, not when they say they're signed".
The delay is said have put other European clubs on alert with the Argentina global having enjoyed another impressive start to the 2017-2018 campaign, scoring 16 goals in 17 appearances.
Officials from Barcelona have denied that, claiming that the picture of Messi putting pen to paper on the deal is all that is required with the player's father having already signed the paperwork on behalf of his son.
La Liga president Javier Tebas expects to boost its bottom line with a huge new television rights deal as of 2019-2020 that could be worth 2.3 billion euros ($2.7 billion) per year.
COUTINHO FOR BARCELONA: Camp Nou legend and fellow Brazilian Ronaldinho pointed out that Coutinho would be an ideal signing for Barcelona as he has the flair and quality to succeed.
"After he finishes playing we want him to remain linked to the club".
The 30-year-old spoke last week of his desire to return to his boyhood club Newell's Old Boys at some point in his career.
"The desire is always playing for Newell's, it is what I dreamed as a kid", he said.
"I can not say I'm going back because I do not know where I'm going to be".