If you're defending a corner, and don't jump, expect to be clattered. He's not under obligation to jump, but he'll get battered if he just stands still. Lindelof jumped normally, is it his fault that his leap had his knee at face level and the other guy didn't jump? That's just not a foul for me. Eyes fully on the ball and trying to jump for it.
No that was absolutely not a normal jump. Lindelof took off from the middle of the box and took a leap, travelling laterally as well as vertically. It is the lateral movement that makes the jump not "normal", and is also the reason why his knees go first whereas in what you might call a normal jump, a player leads with his arms.
You may be remembering the incident as though they were jostling for the ball and then Lindelof simply jumped and the opponent stood still. In fact, the opponent was not even aware of Lindelof's presence because Lindelof was nowhere near him at the moment the ball was played, and he had no business flying into the player like that because the ball was nowhere near reachable.
Even if he got the ball, the rules of the game forbid you from endangering opponents with uncontrolled challenges which is what Lindelof's jump was. In another context, it could have been a great header but on this occasion, it was a foul that put the opponent at very serious risk.
