Lukaku is an excellent player but he have one BIG problem and is the drama he made in every team he goes, is incredible but he has something in his brain that make him feel uncomfortable or wants to leave, you can see it when he was in Chelsea and other teams, so he can have so much troubles in Saudi arabia i guess.
Moving to Saudi Pro League, it can be challenging for him I guess, because more European players that made move to SPL are complaining about the unfavorable treat they receive and some have terminated their contract and make a u-turn back to European football. Are you saying Romelu Lukaku is mentally unstable? Ofcourse he's one of the top strikers in European football, he takes his time to be present for matches, he do what he have to do inother to net goals. Lukaku have play for top clubs in his career, he's current club is AS Roma, where he still delivers good job in the team's frontline.