As far as I can see, the backups (largely) weren't the problem. It's Son, Johnson and Kulu. How many chances does a player need to score? How many dodgy 1v1s, how many times giving the ball away cos you're too weak?
It's ridiculous.
Recurring theme between the last 2 games... If your back 4 is significantly weakened; the attack needs to step up to the plate.
(Vice versa if your attacking is ravaged by injury.)