Chelsea secured their first Champions League win of the season with a narrow 1-0 victory over Benfica at Stamford Bridge, courtesy of a calamitous own goal from Richard Rios.

The result eased pressure on head coach Enzo Maresca, whose side had lost three of their last four matches.

Rios own goal separates the sides

The decisive moment came in the first half when Pedro Neto’s cross found Alejandro Garnacho who returned the ball into the box only for Rios to turn it into his own net.

It was a rare highlight in an otherwise tense contest, with Chelsea once again struggling for fluency in attack.

Benfica, managed by former Blues boss Jose Mourinho, threatened early as Dodi Lukebakio hit the post and later forced Robert Sanchez into a save.

Mourinho, making an emotional return to west London, was booked in the second half after protesting a free-kick decision.

Chelsea still unconvincing despite win

Maresca fielded a makeshift lineup due to injuries, starting 18-year-old Tyrique George in attack and handing Facundo Buonanotte a surprise start.

Despite flashes from Neto and Garnacho, Chelsea failed to create clear chances after the interval, while Benfica pushed for an equaliser.

The Blues ended the night with 10 men after substitute Joao Pedro received a second yellow card late on, continuing a troubling run of red cards in recent weeks.

For Mourinho, it was another frustrating night at Stamford Bridge, extending his record as an opposing manager at the ground to just one win in eight attempts.

For Chelsea, the three points provide relief but also underline the work Maresca faces in steadying an inconsistent side.