Jose Mourinho's Stamford Bridge homecoming ended in defeat as Chelsea got their Champions League season going at the second attempt with a 1-0 win over Benfica.

It was the seventh time since his sacking in 2015 that the three-time Premier League winner had returned to sit in the away dugout but there was to be no fairytale for his underdogs, an own goal from midfielder Richard Ríos after 18 minutes the difference.

Enzo Maresca's side had been been outclassed despite a brave, ambitious showing in losing to Bayern Munich in their opening game but Mourinho's visitors posed a different challenge, sitting deep and challenging the home side to pick through them.

They managed it just once but decisively, Pedro Neto and Alejandro Garnacho the goal's twin architects -- one with a cross, the other with a brilliant sliding reach, and the unfortunate Ríos did the rest.

It took less than two minutes for the first round of "Jose Mourinho" chants to fill the air, a reminder to Maresca if one was needed of the challenge that lies ahead if he wishes fully to win a place in supporters' affections.

Three defeats in four had exposed some of the glitches in the circuitry of his young side, chiefly a questionable discipline and a tendency to lose concentration at key moments, but there was enough here to reaffirm that Chelsea remain broadly on track despite their stumble.

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Issues with discipline still need to be addressed. João Pedro, a second-half substitute, was dismissed in the final minute of added time, a second yellow card for a high boot bringing Chelsea's tally of reds to three in four matches. By then, though, victory had been assured.

Enzo Fernández blasted low and wide early on against his former club, then Belgium international Dodi Lukebakio tried to sneak one between Robert Sánchez and his near post, the goalkeeper turning his driven effort onto the woodwork.

Neto warmed up his left foot with a wicked drive that flashed inches wide after darting in off the flank.

It was from the same boot that Chelsea's opening goal was worked minutes later, the Portugal international sending over a lovely, sweeping cross for Garnacho to slide onto determinedly and turn it back into the six-yard box where it bounced in off Ríos.

Lukebakio was a ready danger on the right side with Marc Cucurella struggling to contain the winger, who was Benfica's most dangerous player in the first half. A last-ditch challenge from Trevoh Chalobah prevented his cut-back from reaching striker Vangelis Pavlidis as the visitors threatened a quick response.

The game was briefly paused when missiles rained down on Fernandez from the away end as he prepared to take a corner, the Chelsea captain still a figure of derision in Lisbon after defecting to west London in 2023.

Exciting teenage winger Estêvão was sent on in the second half at the head of a trio of attacking changes as Maresca sought to kill off the game. After substitutions during Saturday's defeat to Brighton that were deemed negative, the spirit of adventure drew a wave of appreciation from supporters near the dugout.

He remains short of the love showered over his opposite number, but this win was a start.