Just checked it in the USTA website aswell.
check rule 24.e.
and this USTA comment :
USTA Comment 24.5: Does a player lose a point if the ball hits
his racket twice during one swing? No. Only when there is a definite
and deliberate “second push” by the player does the shot become
illegal. “Deliberately” is the key word in this rule. Two hits occurring
during a single continuous swing are not deemed a double hit.