Frank Lampard's role for Kai Havertz in the Chelsea attack is fairly obvious, but the jury is still out on the 21-year-old attacker.
The Blues' new £89million signing has shown some promise, such as a hat-trick display in the EFL Cup win over Barnsley and getting his first Premier League goal in the 3-3 draw with Southampton, but question marks still exist about Havertz's role in the side.
The German was disappointing in Chelsea's 0-0 draw with Sevilla, while former Blues star Frank Leboeuf publicly admitted he was 'unconvinced' by the former Bayer Leverkusen man despite netting four goals so far this campaign.