Juve are now planning to re-sign their former player four years after losing him to the Premier League outfit - this time in a mega fee worth £125 million.
"He is an exceptional player, he is ready to play because he is now fit and he will play against Celta on Sunday."
Messi is believed to be ready to leave Camp Nou, when his current deal expires in 2021.
"I wanted him to hear from me my opinion on him, and that I was ready to support him and that I was ready to push the club to be supportive of him too, because I thought he could be a really, really good player for us and he could enjoy in this football club
Neymar would require a non-EU player slot on Madrid's roster and the LaLiga club currently has none remaining.
The 28-year-old was not even named in Chelsea's squad that defeated Newcastle United 2-1 in the Premier League encounter on Saturday at Stamford Bridge.
After the game, he told BT Sport: "We have to be honest and admit physically we are not ready, but you have to show heart and this team is ready to change a lot of things.
PSG are trying to lure the 25-year-old Brazilian to France and are ready to pay off his 222 million euro ($256.8 million) release clause and make the player the best-paid footballer on the planet.
I feel ready, ready to be part of the team. 'I had a chance to play with the national team so I did a good job there.
Shaw managed to finish United the dramatic 3-2 comeback win over Newcastle at Old Trafford on Saturday.
Chelsea winger, Victor Moses is ready to join Fenerbahce unless he is handed 200,000 euros by the Turkish giants if he helps the Istanbul club avoid relegation this season.
Kevin-Prince Boateng getting his jersey ready: 2. At Barcelona's office: 3. He posed nicely for the camera: 4. He gets Number 19, a jersey number formerly wore by Lionel Messi: 5. He displayed his dazzling skills: 6.
The defensive midfielder who has been valued at about €50 million takes his position as the 94th most expensive player in the world. Paris Saint Germain forward Kylian Mbappe is the most expensive player in the world with a value of €259.2 million.
Everton are ready to table £20million for Manchester City's Nigeria forward Kelechi Iheanacho as a possible replacement for Romelu Lukaku.