Juventus stopper Wojciech Szczesny, 28, enraged the Argie goalscorer by smacking the ball straight at his head.
The duo were warming up at the Allianz Stadium in Turin as they prepared to face Manchester United.
Ex-Arsenal No1 Szczesny was working on his kicking when he aimed a powerful strike straight at his team-mate.
Dybala, 24, certainly felt the impact and fumed at the Polish keeper, who offered his apologies.
The Juve star was in the wars during the first-half as well as Nemanja Matic clattered into him.
United's Serbian midfielder was booked over the incident in a scoreless opening period.
Hosts Juventus enjoyed the best of the chances as Sami Khedira hit the post from inside the area.
But the Old Lady – who won 1-0 at Old Trafford – could not break down their visitors.
Dybala and Cristiano Ronaldo will hope to make more of an impact in the second-half.
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