Gabriel Martinelli made it two goals in as many Champions League matches as Arsenal ran out 2-0 winners over Olympiacos at the Emirates Stadium. The Brazilian could not believe his luck when he stabbed home inside the six-yard box after Viktor Gyokeres' shot was saved and then rolled onto the post.

The Gunners huffed and puffed but were unable to blow the visitors away after squandering a number of chances and there were also a few defensive scares as Olympiacos pushed for an equaliser.

David Raya was in impressive form between the sticks for the hosts and he made a number of key saves to ensure Arsenal maintained their 100 per cent winning start in Europe before Bukayo Saka added gloss to the scoreline in stoppage time.

Here football.london brings you five talking points from the Emirates.

Why Arteta shouted at Saliba

Seconds after Arsenal had opened the scoring through Gabriel Martinelli, the TV cameras panned to Mikel Arteta and incredibly, he was not best pleased. It seems strange to say but the Spaniard appeared to be irked with his side's lack of defensive solidity in the opening exchanges and he was bellowing instructions towards William Saliba...