I've was lucky enough to pack Petit quite early of fifa 19. Fortunately he was untradeable, which meant I had to use him (Otherwise I would have sold him). Now I have played 415 games with him and I absolutely love him. He is incredible strong and really good at tackling. All in all his defensive stats are exceptionel for a defensive midfielder. But the thing that really stands out for me is his longshots! His got a crazy left footed shot, I've banged so many top bins with him! 85 goals (90% longshots) and lot of them has been winning goals! His acceleration (83) and sprintspeed (81) is good and he is really good as a box to box player. Passing is great as well (120 assists until now) and heading is top class as well, it's not so often his gets in the box for a header, but when he does, it's a 100% goals.
Last but not least, his physicals are perfect, extremely strong with 88 strength as base stat, stamina 93, aggression 91 and jumping 78.
Good composure and reactions
Stamina, strengt, aggression and jumping
Acceleration and speed
None really, if I have to choose one it would be his dribbling stats, but even them are good because of his position, which doesn't require him to dribble between defenders and such.