McFarlane backs Chelsea flops after woeful Forest defeat
The Blues' hopes of qualifying for the Champions League are hanging by a slender thread following the chastening loss at Stamford Bridge.
Taiwo Awoniyi marked his 100th Forest appearance with the early opener and Igor Jesus' penalty doubled their advantage soon afterwards.
Cole Palmer compounded Chelsea's misery when he missed a penalty late in the first half.
Awoniyi struck again after the interval and Joao Pedro's eye-catching bicycle kick in the closing stages was no consolation for lacklustre Chelsea.