Raul Jimenez had earlier put the newly-promoted side in front and they were on course for a shock victory until the Belgian popped up.
The Italian worldwide was substituted with 18 minutes left to play and was greeted with cheers at Stamford Bridge by fans who do not seem to like him.
Their next assignment in the league is against Wolverhampton Wanderers on Sunday yet apart from a top-four finish, Maurizio Sarri's side could yet secure Champions League football next season by winning the Europa League.
He said: "If the other players don't move without the ball, Jorginho is in trouble".
"He is able to play it one-touch, but you need movement from the other players".
"We'll prepare ourselves for the competition, but it was a very tough game against a team with very good players and a very good manager". "Today was a great opportunity".
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As has often been the case with Chelsea this season, Maurizio Sarri saw his side dominate the ball, enjoying 75 per cent of the possession at Stamford Bridge, while having 22 attempts on the visitor's goal.
"But, on the other hand, we need to improve with our attacking". We needed to move the ball faster, we needed more movements without the ball, more movements into space, behind the line. He needs more movement without the ball, not only when he has the ball at his feet.
"Then, for the last 20 minutes, Jorginho is not suitable for a 4-2-3-1, so (taking him off) was a effect of changing system, not the performance".
"Then at the end we changed the system for the first time to a 4-2-3-1".
"We keep going, get back training and try to win some games".