Koscielny will serve as "No 1 captain" but is likely to be out of action until the new year because of injury. Former Paris Saint-Germain manager Unai Emery has taken over the reins at Arsenal from club legend Arsene Wenger in what will be a completely new experience for many Gunners fans.
Aaron Ramsey, Granit Xhaka and Mesut Ozil - who notably wore the armband in a pre-season friendly - are the others, though it is Cech who will take on captain duties against City. "First, he is injured but he is also captain of this group, is Koscielny", Emery said ahead of Sunday's Premier League opener against Manchester City.
"I want the players and supporters to feel that together, and also enjoy each match, each moment in our stadium, and in this way the team transmits to the supporters the passion".
Standing ovation for Karius at his Anfield return
That combines with the £75m purchase of Virgil van Dijk in January as Liverpool look for their first ever Premier League title. Three minutes later, Wijnaldum rounded off a well-worked team move with a neat finish to double the hosts' lead.
"We have a lot of ambition to start (well) on Sunday against the last winners of the Premier League", he added. Arsenal's decision to cash-in on a player with one year left on his current deal comes as no surprise as Emery looks set to trim his squad even further.
Arsenal's opening game of the season will be against reigning champions Manchester City on Sunday, August 12, before facing rivals Chelsea six days later.
"Today, we had a meeting with the players to close all the possibilities to bring more players".
"My first message is clear: think about each match". I like playing him because the preparation is demanding, to try and beat his teams and when we were in Spain, every match against Barcelona for Valencia and Sevilla was very exciting. "I am looking every day and the players are smiling in training with a big collective spirit". "But we want to play with the idea to create a winning mentality". "And then when we have the space, to be aggressive going forward. My idea is to give us the best performance".