Chelsea's attacking deficiencies for the past five years have been well documented. They're not a new story. They are still a very potent problem for Thomas Tuchel as he enters a new season though.
Without Romelu Lukaku, who was meant to be the sure fire way of firing in 20 goals a season, the club now have only Kai Havertz as a senior central attacker, with Armando Broja looking set to move to West Ham. Whilst the German has had his moments in a blue shirt, even he didn't beat Lukaku's eight goals last season.
This adds a lot of pressure onto the goalscoring winger, Raheem Sterling. With 109 league goals to his name already and the intelligence to pick up the right spaces in the box when needed, Sterling has become a consistent source of goals throughout his career.