Koscielny's rebellion adds to Emery's worries in Arsneal's pre-season preparation

Arsenal cruised to victory over a disjointed Southampton thanks to two first-half goals from Alexandre Lacazette and Henrikh Mkhitaryan at the Emirates on Sunday, taking them back into the top four in the Premier League.

Arsenal ease past Southampton to go fourth in Premier League

Goalkeeper David Ospina and midfielder Henrikh Mkhitaryan are also doubtful for the trip to Madrid after picking up injuries at Old Trafford

Arsenal's Iwobi confident of being fit for Atletico clash

A first-half header from Shkodran Mustafi and second-half strikes from Pierre-Emerick Aubameyang and Henrikh Mkhitaryan sealed the win for the Gunners

EPL: Arsenal beat Watford 3-0 for first clean sheet in 12 league matches

Alexis Sanchez signs for Man Utd, Henrikh Mkhitaryan joins Arsenal

Finally, the Sanchez-Mkhitaryan deal done

The midfielder displayed good form for the German club which finished second in the Bundesliga last season

United make 'improved offer' for Dortmund's Mkhitaryan