Chelsea extended their impressive turnaround under new coach Thomas Tuchel with a 2-0 home win over in-form Everton on Monday as Kai Havertz played a key role in both goals on his return to the starting XI. The German had struggled to show why Chelsea paid a reported $98 million for him last year. But it was his shot that Everton defender Ben Godfrey turned into his own net in the 31st minute after a Marcos Alonso cross. In the 64th minute, Havertz raced on to a long ball from Mateo Kovacic and was brought down by Everton goalkeeper Jordan Pickford. Jorginho scored from the spot after his trademark skip and jump to send Pickford the wrong way. Havertz had put the ball in the back of the net himself in the 53rd minute but a VAR check confirmed that he used his arm to control the ball before turning and striking it past Pickford. The England goalkeeper pulled off a string of saves to prevent Everton - who had won their previous three matches without conceding a goal - from going down to a heavier defeat.