The Frenchman, 26, has been rehabilitating in the sun and heat with a plastic cast around his right foot and ankle after suffering an injury against Arsenal last month.
Zidane was in the Middle East to take part in the 'Dubai AI in Sports conference' earlier this week.
And pictures released by the Daily Star suggest Pogba was exchanging words with Real boss Zidane, who has been eager to bring the United star to Madrid.
The French duo "shared a 10-minute chat" on the beach in Dubai.
Pogba was a transfer target for the La Liga giants in the summer after revealing he was seeking a "new challenge".