Arsenal manager Mikel Arteta has indicated that defender Jurrien Timber could be available for Sunday’s Premier League match against Chelsea. Timber has not played in any competitive games since coming on as a substitute in the Champions League final in May, marking his first action since mid-March. The Netherlands international missed the World Cup due to a persistent groin injury, which required surgery. Timber recently returned to first-team training with Arsenal after the new season began, but he was not expected to be ready for selection until later in the month. However, Arteta confirmed during his pre-match press conference on Friday that Timber is in good condition and could be considered for the game against his London rivals. "He's in really good condition at the moment," Arteta said. "He's been training with us now, he's in a good place." When asked directly if Timber could play against Chelsea, Arteta replied, "We will decide again tomorrow after training." In addition to Timber’s potential return, there was positive news for Bruno Guimaraes, who made a brief appearance as a substitute in Arsenal’s match against Aston Villa. Although he was not seen in training on Thursday, Arteta said Guimaraes had suffered a minor knock during the Villa game. "He had a knock against Villa in the previous game," Arteta explained. "He's been assessed, but probably tomorrow he will be OK to train." This suggests that Guimaraes is likely to be back in action soon. However, the fitness of Cristhian Mosquera remains uncertain. The defender was substituted by Ezri Konsa in the second half of Arsenal’s game against Aston Villa. Arteta described the decision as a precaution rather than an injury-related concern. "It was more precaution than anything else," he said. "We have to see tomorrow in the session how he feels." This means Mosquera’s availability for Sunday’s game will depend on how he feels during training on Saturday. With several key players returning to training and some still under evaluation, Arteta’s squad is showing signs of depth as the team prepares for a crucial Premier League clash against Chelsea. The manager’s comments suggest that the final lineup will be decided based on the latest fitness assessments and match strategy. Fans will be watching closely to see how these developments affect Arsenal’s performance in the upcoming game.