Chelsea dropped their first points in the Champions League in a dour goalless draw at home to PSG.
The Blues had few clear chances, though Mateja Kezman shot wide, Frank Lampard just over and Joe Cole came within inches of converting a free-kick.
Didier Drogba, who came on as a substitute, had a great chance to score but shot straight at the PSG keeper.
PSG striker Reinaldo drilled a shot into the side netting while Lorik Cana missed the ball from short range.
But despite PSG's failure to score their coach Vahid Halilhodzic knows that his team now have an excellent chance of qualifying if they beat CSKA Moscow.
With Chelsea already assured of qualification from the group, Jose Mourinho made seven changes from the team that were held by Bolton on Saturday.
Goalkeeper Carlo Cudicini made his first Champions League appearance of the season, while Cole was also handed a starting role.
Johnson, Kezman, Alexei Smertin, Wayne Bridge and Scott Parker were also given the chance to stake their claim for a regular starting berth while Drogba made his first appearance since injuring his groin on 3 October.
Cole and Kezman worked hard to try and develop an understanding, with the English midfielder playing just behind Kezman.
The Serbia & Montenegro international played a neat one-two with Cole but his cut-back from a tight angle eluded his onrushing team-mate.
Kezman latched on to a superb through ball and wrong footed Mario Yepes, but snatched at his shot and the ball flew wide of Lionel Letizi's goal.
But all too often Chelsea gave the ball away and PSG started to threaten.
Reinaldo went down under a challenge from Ricardo Carvalho but his appeals for a penalty went unanswered, while a powerful long-range strike from Sylvain Armand was deflected wide off Johnson.
A delightful reverse pass put Armand in space minutes before the break, but the angle was tight and he drilled his shot into the side netting.
Damien Duff came on at the start of the second half and the home team increased the tempo of their play.
Lampard drilled a long-range shot just over after 55 minutes and shortly afterwards Cole came within inches of guiding home his free-kick from wide on the left.
Letizi saved after Lampard shot on the turn from a Duff corner and, with 62 minutes gone, Drogba made his return to action, replacing Kezman.
Drogba soon had the ball in the back of the PSG net but the goal was ruled out for offside.
PSG retreated further back as Chelsea pushed for a winner - clearly content to pick up a point and take themselves level on points with Porto.
But Cana had a great chance to break the deadlock for the visitors but completely missed his shot.
Drogba had an excellent opportunity to mark his return with a goal, but after being played clean through shot straight at Letizi.
Chelsea: Cudicini, Johnson, Ricardo Carvalho, Gallas, Bridge,
Smertin, Parker, Lampard (Gudjohnsen 63), Cole,
Kezman (Drogba 62), Robben (Duff 45).
Subs Not Used: Pidgeley, Geremi, Terry, Tiago.
PSG: Letizi, Pichot, Pierre-Fanfan, Yepes, Armand, Mendy, Cana,
M'Bami, Cisse (Boskovic 83), Reinaldo (Coridon 76),
Pauleta (Pancrate 89).
Subs Not Used: Alonzo, Ibisevic, Helder, Bamba.
Ref: Rene Temmink (Holland).