The 20-year-old was handed his fourth appearance by coach Aliou Cisse in the absence of Liverpool forward Sadio Mane who was suspended for the game due to accumulated yellow cards in the qualifiers.
Diatta rewarded Cisse's faith in him by sealing the Teranga Lions’ victory with a stunning strike from 18-yards after Keita Balde’s opener.
“Of course yes. He is a talented player. We know that already. He is one of the young players in the team that will develop with time,” Koulibaly told Goal.
“I am happy for him. I am happy that he won the Man of the Match today. He is a young man that works very hard and heeds to instructions.
“He deserves what he achieved today: the goal and the Man of the Match. It's all good but you have to remain humble.”
The Teranga Lions will hope to continue their impressive form when they take on the Desert Foxes at the 30 June Stadium, Cairo on Thursday.