A difficult spell for Chelsea threatened to get worse when Christensen was forced off after just 27 minutes with a hamstring injury.
But Conte’s side finally upped the tempo in the final 15 minutes of the first half without punishing Bournemouth.
Hazard was guilty of the worst miss, failing to make contact with Marcos Alonso’s cross when unmarked in the six-yard box. Alonso should have done better with a header, while Gary Cahill sent another headed opportunity inches over the bar at the near post.
Chelsea had reason to believe they could go on and claim three points but their hopes were extinguished in a remarkable second-half spell.
There had been little sign of Bournemouth’s threat in the opening six minutes of the half but when Wilson won possession and ran on to collect Ibe’s return pass, the striker slotted comfortably past Courtois.
? CELEBRATION IMAGES ?
Our photographer was in the midst of the action and got some brilliant celebration shots from tonight’s memorable win… ?#afcb ?https://t.co/VMHLNfICkb
Advertisement— AFC Bournemouth ? (@afcbournemouth) January 31, 2018
Conte will have been alarmed at how easily his defence was undone but there was worse to come.
In the 64th minute, Bournemouth pressed high on the left flank with Wilson eventually winning possession before releasing Stanislas to advance on Courtois and beat the keeper with a powerful shot.
The home side were stunned but then came Bournemouth’s third goal three minutes later.
A corner was allowed to make its way through the penalty where Wilson recovered the loose ball and pulled back for Stanislas whose shot was turned in by Ake.