People that blame Maguire for the 1st goal have either never played football or just don't understand set pieces.
1. We are using zonal marking, which means each player has a held position, and they will attack the ball when it comes close.
2. Fred and Williams were not man marking Van Dijk, they were supposed to block him and slow him down so he couldn't reach the ball. That failed.
3. Maguire was not man marking Van Dijk like many suggested. He was guarding his zone. The ball entered close to Maguires zone so he went to attack it, but then got held back to Gomez. Van Dijk then got a running jump, and being 6'5 towered over all our defenders for an easy header. Maguire tried to get there, but the pitfalls of zonal marking pretty much guarantees anybody with a run up gets an advantage.
The tactics are totally to blame, not one individual. We need to stop using zonal marking ASAP, as ever since we've switched to it our defending set pieces have got a lot worse.
We should have allowed Maguire to man mark Van Dijk properly.