Son has been a consistent provider of assists the latest years in the Premier League. Last season, he managed 10 assists in 36 starts (8.9 xA). The season before, he managed 10 assists in 28 starts (7.0 xA). This suggests he hasn't been overperforming and creates a more realistic and fair picture of his ability to assist his teammates. His recent form is relevant too as he's had a very good pre-season. He's scored three goals and made three assists in the four club friendlies he's participated in. 8.00 seems too high here.