That's just not how football works though, this isn't like when a manager puts a player specifically on a player in open play (a la Park vs Pirlo). We're talking about a short space of time where DDG's parries and the back line's priority is reforming their shape in the few seconds it takes for the ball to come in again. It's a great hanging ball and the only realistic way to stop Vestergaard getting the run on it would be to block him which is now super risky with VAR but someone should have at least been in front of him to stop him getting a running jump.
Most CBs, not just Lindelof, would lose that header because he's at a disadvantage in terms of the angle of the cross/where Vestergaard is and the fact that Vestergaard is an absolute mountain - he's ~2m tall.
For me, I think it was AWB who ended up following the ball out but he has to shut down that cross much faster. The So'ton player allowed the ball to run all the way out of the box whilst he picked his cross. If he puts pressure on he'll either turn back and the danger passes or he'll try and take him on but there's so many bodies around you'd hope he'd be well covered.
Secondly, I still think these types of balls will hurt us unless DDG changes his game and comes off his line a bit more. The Header was well within the 6 yard box and the cross was only ever going back stick so I'd like to see some anticipation there, it's something some of our former keepers used to do regularly because it doesn't matter how good a defender is aerially, if someone of vestergaards size has a) got the run on you and b) the cross is high quality then 9 times out of 10 he wins that header.