It was a day of firsts for Arsenal.
In the club's first match of this season's Carabao Cup, summer signing Kieran Tierney made his much-anticipated debut for the Gunners and 18-year-old prospect Gabriel Martinelli scored his two goals for the senior squad in a 5-0 win over Nottingham Forest.
Rob Holding, Joe Willock and Reiss Nelson scored as well for Arsenal, while Calum Chambers notched two assists.
The Gunners also managed to keep a clean sheet, which wasn't a first this season but might have felt like it for the supporters after watching the backline's recent struggles, which included conceding nine goals in the club's last four Premier League fixtures.