But Giroud, who played at Arsenal with Koscielny from 2012 until his departure for Stamford Bridge, insists the 33-year-old has always been loyal to the club.
Much to the dismay of plenty of Arsenal supporters, Shkodran Mustafi was captain for the Gunners' first pre-season game last night and he didn't even know how to wear the armband properly.
"We wanted him to come with us but he chose to stay", Emery said after Arsenal defeated Colorado Rapids 3-0. The 18-year-old, who was signed for an undisclosed fee of £6m from Ituano FC on 2 July, fired home a cross from Dominic Thompson in the 61st minute in Denver.
They eased past the MLS side thanks to goals from youngsters Bukayo Saka, James Olayinka and Gabriel Martinelli. Martinelli was in fine form from the start, just missing a chance to put himself on the scoreboard in the first five minutes when his finish went wide.More news: UK PM candidates set high bar for Brexit talks: no Irish backstop
Koscielny refused to travel to the United States for Arsenal's pre-season tour amid speculation over his future, with Lyon, Bordeaux and Borussia Dortmund linked with a move for the French defender.
"I spoke with him three times for his situation", he said.
Arsenal takes on Bayern Munich on Wednesday, before matches against Fiorentina and Real Madrid as part of the International Champions Cup.
"I feel very sad for him because he's a great person and the media wants to give a bad image of him".More news: MVP Antentokounmpo gives baseball a shot at Yankee Stadium
"For me now, it's clear".
"Now it's a matter for him and the club". The club and him need to speak, they are speaking about his situation. We are in for a tough season, a transitional period, we need a lot of catching up. When asked if he Martinelli could be in his first-team plans, Emery said: Our idea is to give every young player chances to be with us, first in the training ground and after playing matches like today.
"I am so disappointed in your decision to do this at this time, if your agent sees this, and I hope they do, shame on you, shame on you, for doing this to him and convincing him".More news: Paul McCartney, Ringo Starr reunite onstage in LA
- Ryanair forced to slash flights by Boeing 737 Max grounding
- Microsoft Blocks Windows 10 Version 1903 Update on Some Surface Book Hardware
- US lawmakers seek to bar big tech firms from financial services
- Welsh street takes world's steepest title
- North Korea says it's rethinking promises made to Trump
- R. Kelly's Associates Gave The FBI Tapes Leading To His Arrest
- Robbie Gould signs a new contract with the 49ers
- 'Storm Area 51' Goes Viral on Facebook; Air Force Responds
- Hrithik Roshan arrives in Anand Kumar's hometown Patna
- Google responds to leak of audio data from AI assistant reviewer