Gabriel Martinelli extended Arsenal’s perfect start in the Champions League as the Brazilian forward inspired a 2-0 victory against Olympiakos on Wednesday. After winning 2-0 at Athletic Bilbao in their Champions League opener, Arsenal dispatched the Greek champions at the Emirates Stadium to maintain their 100 percent record in the league phase. Martinelli netted in the first half and Bukayo Saka wrapped up the points in the closing moments. Mikel Arteta’s men improved their impressive home record in the Champions League with a 10th clean sheet in their last 13 matches in the competition. Although Olympiakos had scored just once in their previous six Champions League matches, they carried a threat in patches and were only denied an equaliser by a tight offside decision that ruled out Chiquinho’s finish.