Arsenal vs Chelsea: Unbeaten Sides Clash in London Derby
Mikel Arteta will send out an unbeaten Arsenal against an equally perfect Chelsea on Sunday – and he might just have a few more cards up his sleeve than it first appeared.
Mosquera scare eased, but wait goes on
Cristhian Mosquera’s early withdrawal in the 1-0 win at Aston Villa raised alarms, but Arteta moved quickly to calm them. The defender, who started at Villa Park before making way for Ezri Konsa, is being treated as a precaution rather than a confirmed absentee.
“He was more a precaution than anything else, so we'll have to see tomorrow in the session how he feels,” Arteta said, underlining that the final call will come after their next workout.
Mosquera was not among those pictured in training at London Colney on Thursday, which keeps a small cloud over his involvement. For a side that has built its recent resurgence on defensive control, his availability matters.
Timber edging back towards action
The more uplifting news for Arsenal comes at full-back. Jurrien Timber, who has yet to feature this season after a minor groin procedure in the summer, is finally edging back towards the pitch.
He was seen in light training on Thursday, a sight the staff at London Colney have been waiting on for weeks. Arteta didn’t rule out a surprise inclusion in the squad for Chelsea.
“Yeah, he's in really good condition at the moment. As I said, he's been now a few weeks on the pitch and he's been training with us now, so he's in a good place,” the manager explained.
An “outside chance” is all it is for now, but the tone has shifted. Timber’s return, even to the bench, would be a significant boost as the fixtures start to stack up.
Guimaraes a doubt after fresh knock
Not every headline from the treatment room is positive. Bruno Guimaraes faces a race against time after taking another knock against Villa.
The Brazilian has already missed the opening 3-0 win over Coventry City, having picked up a problem in the Community Shield rout of Manchester City. This latest issue has forced the medical staff back into assessment mode.
“Yeah, he had a knock against Villa in the previous game and he's been assessed. Hopefully tomorrow he will be okay for training,” Arteta said.
Like Mosquera, Guimaraes was not spotted in Thursday’s training images. With Chelsea’s midfield capable of turning games in an instant, his presence – or absence – could tilt the balance.
Saliba’s name on the list – and a hint of hope
One name on the squad sheet still carries weight even while he remains unavailable. William Saliba has been included in both Arsenal’s 25-man Premier League squad and their Champions League list, a decision that signals clear optimism over his long-term recovery.
The centre-back continues to rest a serious back issue suffered at the World Cup, an injury that demands patience and careful management rather than hard deadlines.
“Yes, we don't really know the amount of weeks he's going to be out because it's about a healing process in the beginning, it's a bit different,” Arteta said when asked for an update. “We know that we have to respect certain timings. The progression has been really positive in the last few weeks, but we need to wait and see how that one reaction will start to put a lot into it.”
His registration offers a simple message: Arsenal expect him back before January, when squads are resubmitted. For a side with ambitions on multiple fronts, that matters almost as much as any short-term boost.
London derby with perfect records on the line
All of this unfolds against the backdrop of a derby that already feels like a marker for the season. Arsenal and Chelsea stand among just four Premier League sides to have won both of their opening fixtures.
Recent history leans red. The two clubs met four times across all competitions last season; Arsenal took three of those and drew the other. That dominance will linger in Chelsea minds as they walk out at the Emirates.
Arteta, though, knows that records, form and even fitness bulletins can evaporate in the heat of a London derby. What survives is resilience, clarity, and the ability to seize a moment.
On Sunday, with perfect starts on the line and key players hovering between the treatment room and the pitch, we are about to find out which of these two unbeaten sides truly looks ready to set the pace for the rest of the campaign.
