The brother of PSG's billionaire owner posted a cryptic tweet seemingly hinting at a Cristiano Ronaldo transfer

• The brother of PSG's owner tweeted a picture of Cristiano Ronaldo and Lionel Messi both wearing the club's shirts.
• "Maybe?" he wrote alongside the image.
• Speculation over Ronaldo's future has been rife in recent months.

The brother of Paris Saint-Germain's billionaire Qatari owner posted a cryptic tweet showing Cristiano Ronaldo and Lionel Messi both wearing the club's shirts.

Ronaldo is reportedly unsettled at current club Juventus and has been linked with a move away from Turin in recent months.

The 36-year-old quashed rumors he was unhappy last week in a lengthy social media post, but he begun Juventus' season opener on the bench, reportedly at his own request because he "hopes to find a solution" to his future in the coming days.

On Tuesday, Khalifa Bin Hamad Al-Thani - brother of PSG owner Tamim bin Hamad Al Than - added fuel to the fire.

Al-Thani tweeted a picture of Messi, who signed for the French club earlier this month, and Ronaldo alongside each other in PSG shirts with the caption: "Maybe?"

The Qatari royal's tweet was not well received by Lapo Elkann, a relative of Juventus owner Andrea Agnelli.

"CR7 is a Juventus FC player," said Elkann.

"It is disrespectful to keep putting other shirts on him as if he were a card. If he changes team, wherever he goes, he will have respect as a man and as an athlete."

Shortly after Al-Thani's post, speculation over Ronaldo's future intensified with the news that Real Madrid had submitted a $188 million bid for PSG striker Kylian Mbappe.

Spanish sports newspaper Diario AS recently reported that PSG was eyeing a move to bring Ronaldo to Paris next summer as a replacement for Mbappe, whose contract ends in June 2022.

However, if Mbappe leaves for Madrid before the end of the month, PSG may move for Ronaldo sooner.