Arsenal gave away a cheap goal by looking to build from the back against Watford but Bernd Leno believes the approach requires patience.
Watford battled back to draw with Arsenal on Sunday, making Matteo Guendouzi look a bit daft for goading the home fans.
Manchester City tasted defeat for the first time this season against Norwich City, while Liverpool maintained their 100 per cent record.
Arsenal threw away a two-goal lead over Watford but Unai Emery is confident it will prove a valuable learning experience for his side.
Arsenal were architects of their own downfall in Sunday's 2-2 draw with Watford and Granit Xhaka has questioned his team-mates' character.
Watford held Arsenal to a 2-2 draw despite going 2-0 down in Quique Sanchez Flores' first match back at the club.
Mesut Ozil made his first start of the season in Sunday's draw with Watford, but he could not inspire Unai Emery's Gunners.
Arsenal led 2-0 at the interval but had to settle for a draw against struggling Watford on Sunday.
Arsenal boss Unai Emery picked Nicolas Pepe and Pierre-Emerick Aubameyang with Mesut Ozil tucked in behind at Watford.
Watford sacked Javi Gracia when he was in conversation with Unai Emery during a break in Spain.