CHELSEA fell to defeat once again as the pressure mounts on Graham Potter, with Joao Felix seeing red on his debut.
Willian refused to celebrate after scoring the first goal of the game, picking the ball up on the left-hand side and firing a low shot into the back of the net, deflecting off Trevoh Chalobah.
However, Chelsea were level just after half-time as Mason Mount hit the post from a free-kick. Koulibaly followed up to fire in.
Debut man Joao Felix was sent off for a poor challenge on his debut, with his studs high and a correct decision awarded before former Spurs striker Vinicius put the hosts ahead.
The Blues registered yet another defeat as Potter sees the pressure ramp up on him at Chelsea.
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