I'm not privy to what goes on during our training sessions, but, one of the things that I've noticed is that it tends to be the nearest player to the 'keeper that presses them. That's why, yesterday, it was mostly the striker pressing, but, was also Le Fee, Xhaka, Rigg, Adingra, and Cirkin on one occasion. Again, not privy to what goes on, but, everyone knows the drill - someone presses the 'keeper, everyone else does their job. There was a fair bit of 'not doing their job' throughout the move that led to their goal. That or, it was a quite well worked goal by them - credit where credit is due.