Frank Leboeuf has slammed Kai Havertz for his poor start to life at Chelsea, insisting the £70 million ($61m) midfielder is "almost invisible" on the pitch.
Chelsea beat off competition from a whole host of top European clubs to bring Havertz to Stamford Bridge from Bayer Leverkusen in the summer transfer window.
The Blues tied the 21-year-old, who became one of the top players in the Bundesliga during his time at BayArena, down to a five-year contract after forking out a lofty fee for his services, and Frank Lampard has wasted no time in testing his skills in west London.