Champions League: Thomas Tuchel facing a chop after Zagreb defeat

New striker Aubameyang appeared tentative on his Blues bow, though Gabon forward can be afforded leeway given he featured a face mask to protect his broken jaw. However, Chelsea's other off-kilter charges can proffer precious little excuse amid the latest troublesome result for the Blues. The new

Stamford Bridge bosses might have spent a Premier League-record £273million in the summer transfer window, but this is still a team in transition. Dinamo has never reached the Champions League knock-out stages, yet the homespun hosts still had enough to see off the two-time tournament winners.

Chelsea's lack of a clean sheet in their last six games has been a cause for frustration for their manager Tuchel, who was shown a yellow card in their most recent 2-2 draw with Spurs. Tuchel knows that he needs to find some momentum fast to avoid his new era at Chelsea turning into a crossroads.

One bright idea that Tuchel had was to drop Mason Mount into a new role in defensive midfield alongside Kovacic. This was done in an attempt to capitalize on Mount's work rate and pressing ability.

But amid Chelsea's wretched first half, the England international too often lost positional discipline, leaving glaring gaps for Dinamo to exploit.

Tuchel switched formations and ideas several times to turn the tide after the break, but Dinamo held firm as Chelsea again flailed at fluency.

Chelsea marched into early control through dominating possession, but several half-chances were left unfinished.

Debutant Aubameyang teed up Sterling, only for England forward's shot to be well blocked. Aubameyang then looked for a square ball when he should have lined up a strike on goal.

Zagreb quickly snatched the lead away from Chelsea after their attack broke down just outside the Dinamo area. Orsic took advantage of this opportunity and scored past the desperate Kepa Arrizabalaga. Chelsea's troubles continued as Orsic missed another chance, but Aubameyang was unable to take advantage of it.

Hakim Ziyech replaced Cesar Azpilicueta at half-time, with Chelsea switching to a back four.

Aubameyang quickly tapped home from Chilwell's low cross, but the left-back was offside from Kovacic's pass, and the goal did not stand.

Stefan Ristovski almost doubled the home lead by firing a rasping shot on goal from a distance. Kepa palmed the ball away to safety via the crossbar.

Armando Broja showed flashes of promise off the bench, and James drilled a low effort against the upright.

But that late flurry proved to no avail, leaving Chelsea to slump to their third defeat in seven matches.

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